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BESTIARY

Sephiroth

13 recorded variants. Select a variant to see its own stats, artwork and rewards.

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 3,500
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: No elemental weakness recorded for this variant.

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire0%

Ice0%

Wind0%

Earth0%

Lightning0%

Water0%

Light0%

Dark0%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 25002100%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Has extremely high magic defense.

Parries and counters physical attacks during Masamune in Waiting.

Becomes pressured when hit with elemental weakness.

Uses more powerful attacks when pressured, but easier to stagger.

Double Action (unlimited)
Allows two actions.
Endure at 80% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.
Magic Defense +60%
Reduces damage taken from magic attacks by 60%.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 595,
  "table": "DT_UnitParameter",
  "row": "セフィロス（敵）",
  "offset": 197417,
  "faceIconId": 595,
  "dropNormalRate": 1,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": [
    9138
  ]
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 1,350
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: No elemental weakness recorded for this variant.

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire0%

Ice0%

Wind0%

Earth0%

Lightning0%

Water0%

Light0%

Dark0%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Has extremely high magic defense.

Parries and counters physical attacks during Masamune in Waiting.

Becomes pressured when hit with elemental weakness.

Uses more powerful attacks when pressured, but easier to stagger.

Double Action (unlimited)
Allows two actions.
Endure at 80% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.
Magic Defense +60%
Reduces damage taken from magic attacks by 60%.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2505,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第一）HEAT",
  "offset": 342247,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 3,500
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: No elemental weakness recorded for this variant.

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire0%

Ice0%

Wind0%

Earth0%

Lightning0%

Water0%

Light0%

Dark0%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Uses a near-fatal attack.

Uses elemental enhancements. Weakness and resistance shifts with the enhanced element.

Uses signature attacks for the last attack during elemental enhancement.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2510,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）平時",
  "offset": 342937,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 3,500
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Water

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire100%

Ice50%

Wind50%

Earth50%

Lightning50%

Water−50%

Light0%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Unleashes a special attack when a fixed number of characters are buffed.

Counters non-elemental attacks.

Becomes pressured if no party members are KO’d after using signature attacks.

Uses more powerful attacks when pressured, but easier to stagger.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2511,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）火",
  "offset": 344255,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 3,500
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Fire

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire−50%

Ice100%

Wind50%

Earth50%

Lightning50%

Water50%

Light0%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Unleashes a special attack when a fixed number of characters are buffed.

Counters non-elemental attacks.

Becomes pressured if no party members are KO’d after using signature attacks.

Uses more powerful attacks when pressured, but easier to stagger.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2512,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）氷",
  "offset": 344943,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 3,500
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Earth

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire50%

Ice50%

Wind50%

Earth−50%

Lightning100%

Water50%

Light0%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Unleashes a special attack when a fixed number of characters are buffed.

Counters non-elemental attacks.

Becomes pressured if no party members are KO’d after using signature attacks.

Uses more powerful attacks when pressured, but easier to stagger.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2513,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）雷",
  "offset": 345631,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 3,500
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Ice

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire50%

Ice−50%

Wind100%

Earth50%

Lightning50%

Water50%

Light0%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.

Traits & Passives

Unleashes a special attack when a fixed number of characters are buffed.

Counters non-elemental attacks.

Becomes pressured if no party members are KO’d after using signature attacks.

Uses more powerful attacks when pressured, but easier to stagger.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2514,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）風",
  "offset": 346319,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 1,350
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Water

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire100%

Ice50%

Wind50%

Earth50%

Lightning50%

Water−50%

Light0%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Unleashes a special attack when a fixed number of characters are buffed.

Counters non-elemental attacks.

Becomes pressured if no party members are KO’d after using signature attacks.

Uses more powerful attacks when pressured, but easier to stagger.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2515,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）火HEAT",
  "offset": 347007,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 1,350
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Fire

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire−50%

Ice100%

Wind50%

Earth50%

Lightning50%

Water50%

Light0%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Unleashes a special attack when a fixed number of characters are buffed.

Counters non-elemental attacks.

Becomes pressured if no party members are KO’d after using signature attacks.

Uses more powerful attacks when pressured, but easier to stagger.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2516,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）氷HEAT",
  "offset": 347695,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 1,350
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Earth

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire50%

Ice50%

Wind50%

Earth−50%

Lightning100%

Water50%

Light0%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Unleashes a special attack when a fixed number of characters are buffed.

Counters non-elemental attacks.

Becomes pressured if no party members are KO’d after using signature attacks.

Uses more powerful attacks when pressured, but easier to stagger.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2517,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）雷HEAT",
  "offset": 348383,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 1,350
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Ice

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire50%

Ice−50%

Wind100%

Earth50%

Lightning50%

Water50%

Light0%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.

Traits & Passives

Unleashes a special attack when a fixed number of characters are buffed.

Counters non-elemental attacks.

Becomes pressured if no party members are KO’d after using signature attacks.

Uses more powerful attacks when pressured, but easier to stagger.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2518,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）風HEAT",
  "offset": 349071,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 3,500
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: Light

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire0%

Ice0%

Wind0%

Earth0%

Lightning0%

Water0%

Light−50%

Dark200%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Starts a countdown of fate.

When the countdown reaches 0...

Triple Action (Permanent)
Performs three actions.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2520,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第三）",
  "offset": 349759,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 45 · BOSS

HP: 250,000
MP: 100
Stagger: 1,350
Strength: 560
Stamina: 546
Magic: 560
Spirit: 546
Speed: 300

14,500 EXP · 12,000 gil

Plan your approach

Recorded elemental weaknesses: No elemental weakness recorded for this variant.

Match your attack to this variant’s resistance. Stored stats and move lists do not establish an exact turn order, a guaranteed status infliction, or demo availability.

Test damage assumptions · Compare complete builds

Element resistance

Fire0%

Ice0%

Wind0%

Earth0%

Lightning0%

Water0%

Light0%

Dark0%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow30%

Strength down30%

Stamina down30%

Magic down30%

Spirit down30%

Instant death100%

Gravity100%

0% neutral · Negative: more damage · 100%: immune · 200%: absorbs. Status percentages are resistance, not infliction chances.

Drops

Normal

Item 250028.33%

RareNone

Steals

NormalNone

RareNone

Drop percentages are base chances before bonuses. Steal slot probabilities are still being verified.

Attack Pattern

Uses a six-action opening pattern, changes to a nine-action elemental rotation around 80% HP, and begins a fixed finishing countdown around 20% HP.

Numbers count this boss’s own actions; combos are listed together. Battle-turn rules are labeled.

When	Action
Opening phase, repeating six-action cycle	Masamune in Waiting; Triple Threat or Hell’s Gate equally; Purging Blade; Firaga (one party member) or Blizzaga (one party member) equally; Boundless Void; Thundaga (one party member) or Aeroga (one party member) equally.
At 80.1% HP or less	Use One-Winged Angel instead of the next attack and enter the elemental phase. Before the first infusion, finish the current set of actions with Hell’s Gate (50%), Boundless Void (25%), or Purging Blade (25%).
Elemental phase, start of Sephiroth’s nine-action cycle	Choose Fire Infusion, Ice Infusion, Lightning Infusion, or Wind Infusion, favoring whichever elements Sephiroth has used the least. Use Heartless Angel immediately before the infusion.
Elemental phase, first group of three actions	Infusion preceded by Heartless Angel; the corresponding Fire/Ice/Lightning/Wind spell; Hell’s Gate.
Elemental phase, second group of three actions	Use the infused element’s area move; Purging Blade; then Darkga or Graviga equally.
Elemental phase, third group of three actions	Boundless Void or Hell’s Gate equally; the infused elemental spell; Octaslash. Then return to the uninfused form and choose another infusion.
Element-specific spells and area moves	Fire uses Firaga (the whole party) and Flamewall; Ice uses Blizzaga (the whole party) and Frostspike; Lightning uses Thundaga (the whole party) and Thunderstorm; Wind uses Aeroga (the whole party) and Windwail.
During an elemental form	If one party member has four or more of the buffs Sephiroth checks, replace the next ordinary attack with Nihilistic Solitude. These include main-stat boosts, Regen, Reflect, Haste, and several special buffs and formations.
At 20.1% HP or less during the elemental phase	Use Divine Proclamation (self) instead of the next attack, then begin the finishing sequence.
Final countdown, subsequent nine actions in order	Thundaga (the whole party); Heartless Angel; Blizzaga (the whole party); Octaslash; Aeroga (the whole party); Nihilistic Solitude; Firaga (the whole party); Hell’s Gate; Divine Proclamation (the whole party). Continue using Divine Proclamation (the whole party) afterward.

Pattern Changes

In the opening phase, Sephiroth’s counterattack is Slash, changing to Triple Threat after HEAT. Hitting Sephiroth’s weakness in the original form prepares HEAT.
In the elemental phase, elemental attacks avoid Sephiroth’s counter. Against non-elemental damage, Sephiroth counters with Heartless Angel before an infusion, or with Sephiroth’s current elemental spell after an infusion.
Break restarts the current attack pattern. When Sephiroth recovers, Sephiroth’s opening form returns to normal, or Sephiroth’s elemental form loses the infusion. Break does not restart the final finishing sequence.
If everyone in the party survives Octaslash, Sephiroth prepares HEAT for the next infusion.

Combat Actions


Slash	None	Physical	Single Target	12	1	100	25	—	Basic attack.	—
Triple Threat	None	Physical	Random Targets	45	3	100	12	—	Opening phase, repeating six-action cycle	Non-elemental physical damage; each hit selects a random target.
Boundless Void	None	Physical	Single Target	24	2	100	33	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, third group of three actions	Non-elemental physical damage to one target, with Paralysis.
Purging Blade	Dark	Physical	Single Target	36	1	100	16	—	Opening phase, repeating six-action cycle At 80.1% HP or less 1 more Elemental phase, second group of three actions	Dark physical damage to one target, with physical and magic defense reductions.
Hell’s Gate	None	Physical	AoE	30	1	125	12	—	Opening phase, repeating six-action cycle At 80.1% HP or less 3 more Elemental phase, first group of three actions Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to all targets.
Heartless Angel	None	Other	AoE	1	1	500	12	—	Elemental phase, start of Sephiroth’s nine-action cycle Elemental phase, first group of three actions 1 more Final countdown, subsequent nine actions in order	Sets targets' HP to 1. All-target move.
Fire Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Fire enhancement and changes the weakness to Water.
Ice Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Ice enhancement and changes the weakness to Fire.
Lightning Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Lightning enhancement and changes the weakness to Earth.
Wind Infusion	None	—	Self	—	—	—	—	—	Elemental phase, start of Sephiroth’s nine-action cycle	Grants Wind enhancement and changes the weakness to Ice.
Divine Proclamation	None	Physical	Self	—	—	100	12	—	At 20.1% HP or less during the elemental phase	Applies a nine-count countdown to meteor impact.
Graviga	None	Magic	AoETarget Cur HPRatio	—	1	500	0	50 MP	Elemental phase, second group of three actions	Reduce the current HP of all enemies by a set percentage.
Firaga	Fire	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal fire-type magic damage.
Blizzaga	Ice	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal ice-type magic damage.
Thundaga	Lightning	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal lightning-type magic damage.
Aeroga	Wind	Magic	Single Target	30	3	100	21	44 MP	Opening phase, repeating six-action cycle	Deal wind-type magic damage.
Firaga	Fire	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal fire-type magic damage.
Blizzaga	Ice	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal ice-type magic damage.
Thundaga	Lightning	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal lightning-type magic damage.
Aeroga	Wind	Magic	AoE	24	3	100	15	44 MP	Element-specific spells and area moves Final countdown, subsequent nine actions in order	Deal wind-type magic damage.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Elemental phase, second group of three actions	Deal dark magic damage.
Masamune in Waiting	None	—	Self	—	—	—	—	—	Opening phase, repeating six-action cycle	Evades physical attacks and counters for two turns.
Slash	None	Physical	Single Target	12	1	100	25	—	Used in the special responses described above.	Non-elemental physical damage to one target. Counts as a regular attack.
One-Winged Angel	None	—	Self	—	—	—	—	—	At 80.1% HP or less	Signals the start of phase two without displaying a skill banner.
Nihilistic Solitude	Dark	Magic	AoE	24	1	100	12	—	During an elemental form Final countdown, subsequent nine actions in order	Dark magic damage to all targets, with group Dispel.
Octaslash	None	Physical	Single Target	128	8	500	25	—	Elemental phase, third group of three actions Final countdown, subsequent nine actions in order	Non-elemental physical damage to one target.
Divine Proclamation	None	Physical	AoE	99999	1	500	12	—	Final countdown, subsequent nine actions in order	Meteor impact; guaranteed death.
Flamewall	Fire	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Fire magic damage, with physical and magic attack reductions.
Frostspike	Ice	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Ice magic damage, with Slow.
Thunderstorm	Lightning	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Lightning magic damage, with Paralysis.
Windwail	Wind	Magic	AoE	30	3	500	21	—	Element-specific spells and area moves	Deals Wind magic damage, with Silence.

Traits & Passives

Uses a near-fatal attack.

Uses elemental enhancements. Weakness and resistance shifts with the enhanced element.

Uses signature attacks for the last attack during elemental enhancement.

Triple Action (Permanent)
Performs three actions.
Endure at 20% HP
The source says fatal damage is always survived at 0% HP. This appears inconsistent with the ability name; consult the numeric effects.

Research Notes

These patterns were checked against the installed game’s AI.

How the patterns were checked · Detailed source notes

Variant source data

Stored base stats. Encounter effects may modify these values. Battle-group references do not establish demo availability.

{
  "unitId": 2521,
  "table": "DT_UnitParameter",
  "row": "セフィロス（第二）平時HEAT",
  "offset": 343596,
  "faceIconId": 595,
  "dropNormalRate": 12,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}