Spoilers: enemy names, artwork and rewardsIncludes content beyond the demo. Open to view the bestiary; close to hide it.

BESTIARY

Ultima Weapon

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

LEVEL 70 · BOSS

HP: 3,900,000
MP: 9,999
Stagger: 5,000
Strength: 3,840
Stamina: 650
Magic: 1,024
Spirit: 650
Speed: 500

300,000 EXP · 500,000 gil

Plan your approach

Recorded elemental weaknesses: Wind, 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

Fire50%

Ice0%

Wind−50%

Earth50%

Lightning0%

Water−50%

Light0%

Dark0%

Status resistance

Poison100%

Blind0%

Sleep100%

Silence100%

Paralysis50%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow100%

Strength down0%

Stamina down0%

Magic down100%

Spirit down100%

Instant death100%

Gravity100%

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

Drops

Normal

Megalixir100%

RareNone

Steals

NormalNone

RareNone

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

Attack Pattern

Follows a different attack pattern in each mode. Ultima Weapon changes mode after the pattern ends, then starts changing after every two attacks in Ultima Weapon’s final HP phase.

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

When	Action
At the start of the fight	Starts in Modus Infernus. Each mode follows the attack pairs below, then uses Ultima Beam before changing mode.
Modus Infernus, first four attack pairs	Slam then Thwack; a buff move then Atomic Ray; Sandstorm then Firestorm; a buff move then Full power!. The buff move is Bravery if Ultima Weapon’s side lacks ATK up, otherwise Deprotega.
Modus Keraunos, first four attack pairs	Paralysis Slash then an equal choice of Throat Strike or Sleep Slash; Obsidian Vortex then an equal choice of Bioblaster or Slowga; Flash then an equal choice of Berserk or Stun Slash; Mind Blast then Disaster.
Modus Cocytus, first four attack pairs	Gravija then a 50% chance of Syphon Barrage, otherwise the MAG-buff move; MAG-buff move then Darkga; Gravija then Blizzard Beam; Execution then Blizzaga Barrage. The buff move is Faith if Ultima Weapon’s side lacks MAG up, otherwise Deshellga.
Modus Nemea, first four attack pairs	Negation then Laser; Waterga then Dispelga if the party has a buff Ultima Weapon can remove, otherwise Curaga; Esuna if Ultima Weapon has Poison, Blind, Paralysis, a lowered main stat, increased Break damage taken, or Tactical Assault, otherwise Recuperate, then Holy; Mighty Guard then Mighty Aura.
After the four attack pairs, before the final HP phase	Use Ultima Beam, then change mode: 85% chance to take the next mode in Infernus → Keraunos → Cocytus → Nemea → Infernus, or 15% to skip ahead one extra place. Start the new mode from the first pair.
At 30% HP or less, after Colossal Energy Draw	After every two attacks, randomly choose one of the four modes, with an equal chance for each. Keep the same place in the longer pattern; the new mode can be the one already in use.
After the fourth pair in the final HP phase	Use Ultima Beam and then Bravery in Infernus, Slowga in Keraunos, Faith in Cocytus, or Mighty Guard in Nemea. Return to the first pair and randomly choose a mode.
When Blizzaga Barrage or Syphon Barrage executes	Use that skill twice in a row. Berserk aims for someone who does not already have Berserk.

Pattern Changes

At 70% HP or less, or when Ultima Weapon recovers from Ultima Weapon’s first Break, use Colossal Energy Draw. Reaching 30% HP or less afterward starts the faster mode changes.
When Ultima Weapon recovers from Break, jump to Ultima Beam as Ultima Weapon’s next attack.

Fight Details

In Cocytus, using Faith as the second move makes Ultima Weapon repeat the opening pair. Syphon Barrage or Deshellga lets Ultima Weapon continue.

Combat Actions


Slam	None	Physical	Single Target	12	1	100	25	—	Modus Infernus, first four attack pairs	—
Ultima Beam	None	Magic	AoE	48	1	500	12	—	At the start of the fight After the four attack pairs, before the final HP phase 1 more After the fourth pair in the final HP phase	—
Modus Infernus	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to physical mode. Ultima Weapon only.
Modus Keraunos	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to disruption mode. Ultima Weapon only.
Modus Cocytus	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to magic mode. Ultima Weapon only.
Modus Nemea	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to healing mode. Ultima Weapon only.
Colossal Energy Draw	None	—	AoE	—	—	—	—	—	Used in the special responses described above.	An enormous amount of energy is gathering... Ultima Weapon only.
Thwack	None	Physical	AoE	12	4	100	12	—	Modus Infernus, first four attack pairs	—
Bravery	None	Magic	Single Target	—	—	100	25	6 MP	Modus Infernus, first four attack pairs After the fourth pair in the final HP phase	Increase physical attack of an ally.
Deprotega	None	Magic	AoE	—	—	100	25	24 MP	Modus Infernus, first four attack pairs	Black magic. Lowers all enemies' physical defense. Ultima Weapon variant.
Atomic Ray	Fire	Physical	Single Target	24	1	100	25	—	Modus Infernus, first four attack pairs	—
Sandstorm	Earth	Physical	AoE	12	2	100	12	—	Modus Infernus, first four attack pairs	Effects: Accuracy Variation. Open the ability for details.
Firestorm	Fire	Physical	AoE	18	1	100	12	—	Modus Infernus, first four attack pairs	—
Full power!	None	Physical	Single Target	30	1	100	0	—	Modus Infernus, first four attack pairs	Full Power! Ultima Weapon variant.
Esuna	None	Magic	Single Target	—	—	100	25	10 MP	Modus Nemea, first four attack pairs	Cure all status ailments other than KO.
Dispelga	None	Magic	AoE	—	—	100	0	42 MP	Modus Nemea, first four attack pairs	Remove buffs from all enemies.
Faith	None	Magic	Single Target	—	—	100	25	6 MP	Modus Cocytus, first four attack pairs After the fourth pair in the final HP phase	Increase magic attack of an ally.
Slowga	None	Magic	AoE	—	—	100	0	24 MP	Modus Keraunos, first four attack pairs After the fourth pair in the final HP phase	Decrease speed of all enemies.
Deshellga	None	Magic	AoE	—	—	100	25	24 MP	Modus Cocytus, first four attack pairs	Black magic. Lowers all enemies' magic defense. Ultima Weapon variant.
Gravija	None	Magic	AoETarget Cur HPRatio	—	1	500	0	75 MP	Modus Cocytus, first four attack pairs	Reduce the current HP of all enemies by 75%.
Curaga	None	Magic	Single Target	1500	1	100	60	50 MP	Modus Nemea, first four attack pairs	Healing: fully restores HP.
Holy	Light	Magic	Single Target	80	1	100	40	63 MP	Modus Nemea, first four attack pairs	Deal light magic damage.
Waterga	Water	Magic	AoE	24	3	100	15	44 MP	Modus Nemea, first four attack pairs	Deal water-type magic damage.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Modus Cocytus, first four attack pairs	Deal dark magic damage.
Throat Strike	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Skill Unavailable. Open the ability for details.
Laser	Light	Magic	Single Target	18	1	100	25	—	Modus Nemea, first four attack pairs	—
Sleep Slash	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Paralysis Slash	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Mind Blast	Lightning	Magic	Single Target	24	1	100	25	—	Modus Keraunos, first four attack pairs	Inflicts Paralysis, Poison and Silence on one enemy.
Flash	None	Physical	AoE	—	—	100	12	—	Modus Keraunos, first four attack pairs	Inflicts Blind on all enemies.
Mighty Guard	None	—	AoE	—	—	—	—	—	Modus Nemea, first four attack pairs After the fourth pair in the final HP phase	Effects: Defense. Open the ability for details.
Bioblaster	None	Magic	AoE	12	1	100	12	—	Modus Keraunos, first four attack pairs	Effects: Parameter Variation. Open the ability for details.
Blizzard Beam	Ice	Magic	Single Target	18	1	100	25	—	Modus Cocytus, first four attack pairs	—
Stun Slash	None	Physical	Single Target	12	1	100	25	—	Modus Keraunos, first four attack pairs	Deal physical damage and inflict Paralysis.
Blizzaga Barrage	Ice	Magic	Single Target	60	3	100	0	—	Modus Cocytus, first four attack pairs	Deals Ice magic damage. Ultima Weapon only.
Syphon Barrage	None	Magic	Single Target	100	4	100	0	—	Modus Cocytus, first four attack pairs	Absorbs MP. Ultima Weapon only.
Mighty Aura	None	—	Self	—	—	—	—	—	Modus Nemea, first four attack pairs	Bravery and Faith. Ultima Weapon variant.
Recuperate	None	—	AoE	—	—	—	—	—	Modus Nemea, first four attack pairs	Restores the stagger gauge. Ultima Weapon only.
Disaster	None	—	AoE	—	—	—	—	—	Modus Keraunos, first four attack pairs	Has a chance to inflict Blind, Silence, Confusion and Doom on all enemies.
Negation	None	—	All Units	—	—	—	—	—	Modus Nemea, first four attack pairs	Effects: Cure Status Condition. Open the ability for details.
Execution	Dark	Magic	AoE	36	3	500	12	—	Modus Cocytus, first four attack pairs	—
Obsidian Vortex	None	—	AoE	—	—	—	—	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Berserk	None	—	Single Target	—	—	—	—	—	Modus Keraunos, first four attack pairs When Blizzaga Barrage or Syphon Barrage executes	Cast Berserk on an enemy.

Traits & Passives

Shifts between different modes.

Has high physical attack.

Double Action (unlimited)
Allows two 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": 592,
  "table": "DT_UnitParameter",
  "row": "アルテマウェポン（インフェルノ）",
  "offset": 195665,
  "faceIconId": 592,
  "dropNormalRate": 1,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": [
    9921
  ]
}

LEVEL 70 · BOSS

HP: 3,900,000
MP: 9,999
Stagger: 5,000
Strength: 3,840
Stamina: 650
Magic: 1,024
Spirit: 650
Speed: 999

300,000 EXP · 99,999 gil

Plan your approach

Recorded elemental weaknesses: Ice, 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

Fire0%

Ice−50%

Wind50%

Earth−50%

Lightning50%

Water0%

Light0%

Dark0%

Status resistance

Poison100%

Blind0%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow0%

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

Megalixir100%

RareNone

Steals

NormalNone

RareNone

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

Attack Pattern

Follows a different attack pattern in each mode. Ultima Weapon changes mode after the pattern ends, then starts changing after every two attacks in Ultima Weapon’s final HP phase.

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

When	Action
At the start of the fight	Starts in Modus Infernus. Each mode follows the attack pairs below, then uses Ultima Beam before changing mode.
Modus Infernus, first four attack pairs	Slam then Thwack; a buff move then Atomic Ray; Sandstorm then Firestorm; a buff move then Full power!. The buff move is Bravery if Ultima Weapon’s side lacks ATK up, otherwise Deprotega.
Modus Keraunos, first four attack pairs	Paralysis Slash then an equal choice of Throat Strike or Sleep Slash; Obsidian Vortex then an equal choice of Bioblaster or Slowga; Flash then an equal choice of Berserk or Stun Slash; Mind Blast then Disaster.
Modus Cocytus, first four attack pairs	Gravija then a 50% chance of Syphon Barrage, otherwise the MAG-buff move; MAG-buff move then Darkga; Gravija then Blizzard Beam; Execution then Blizzaga Barrage. The buff move is Faith if Ultima Weapon’s side lacks MAG up, otherwise Deshellga.
Modus Nemea, first four attack pairs	Negation then Laser; Waterga then Dispelga if the party has a buff Ultima Weapon can remove, otherwise Curaga; Esuna if Ultima Weapon has Poison, Blind, Paralysis, a lowered main stat, increased Break damage taken, or Tactical Assault, otherwise Recuperate, then Holy; Mighty Guard then Mighty Aura.
After the four attack pairs, before the final HP phase	Use Ultima Beam, then change mode: 85% chance to take the next mode in Infernus → Keraunos → Cocytus → Nemea → Infernus, or 15% to skip ahead one extra place. Start the new mode from the first pair.
At 30% HP or less, after Colossal Energy Draw	After every two attacks, randomly choose one of the four modes, with an equal chance for each. Keep the same place in the longer pattern; the new mode can be the one already in use.
After the fourth pair in the final HP phase	Use Ultima Beam and then Bravery in Infernus, Slowga in Keraunos, Faith in Cocytus, or Mighty Guard in Nemea. Return to the first pair and randomly choose a mode.
When Blizzaga Barrage or Syphon Barrage executes	Use that skill twice in a row. Berserk aims for someone who does not already have Berserk.

Pattern Changes

At 70% HP or less, or when Ultima Weapon recovers from Ultima Weapon’s first Break, use Colossal Energy Draw. Reaching 30% HP or less afterward starts the faster mode changes.
When Ultima Weapon recovers from Break, jump to Ultima Beam as Ultima Weapon’s next attack.

Fight Details

In Cocytus, using Faith as the second move makes Ultima Weapon repeat the opening pair. Syphon Barrage or Deshellga lets Ultima Weapon continue.

Combat Actions


Slam	None	Physical	Single Target	12	1	100	25	—	Modus Infernus, first four attack pairs	—
Ultima Beam	None	Magic	AoE	48	1	500	12	—	At the start of the fight After the four attack pairs, before the final HP phase 1 more After the fourth pair in the final HP phase	—
Modus Infernus	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to physical mode. Ultima Weapon only.
Modus Keraunos	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to disruption mode. Ultima Weapon only.
Modus Cocytus	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to magic mode. Ultima Weapon only.
Modus Nemea	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to healing mode. Ultima Weapon only.
Colossal Energy Draw	None	—	AoE	—	—	—	—	—	Used in the special responses described above.	An enormous amount of energy is gathering... Ultima Weapon only.
Paralysis Slash	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Throat Strike	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Skill Unavailable. Open the ability for details.
Sleep Slash	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Bioblaster	None	Magic	AoE	12	1	100	12	—	Modus Keraunos, first four attack pairs	Effects: Parameter Variation. Open the ability for details.
Obsidian Vortex	None	—	AoE	—	—	—	—	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Slowga	None	Magic	AoE	—	—	100	0	24 MP	Modus Keraunos, first four attack pairs After the fourth pair in the final HP phase	Decrease speed of all enemies.
Flash	None	Physical	AoE	—	—	100	12	—	Modus Keraunos, first four attack pairs	Inflicts Blind on all enemies.
Berserk	None	—	Single Target	—	—	—	—	—	Modus Keraunos, first four attack pairs When Blizzaga Barrage or Syphon Barrage executes	Cast Berserk on an enemy.
Stun Slash	None	Physical	Single Target	12	1	100	25	—	Modus Keraunos, first four attack pairs	Deal physical damage and inflict Paralysis.
Mind Blast	Lightning	Magic	Single Target	24	1	100	25	—	Modus Keraunos, first four attack pairs	Inflicts Paralysis, Poison and Silence on one enemy.
Thunderspark	Lightning	Magic	Single Target	30	1	100	28	68 MP	Listed in the game files; no trigger was found in this AI.	Deals Lightning magic damage with a chance to inflict Paralysis.
Disaster	None	—	AoE	—	—	—	—	—	Modus Keraunos, first four attack pairs	Has a chance to inflict Blind, Silence, Confusion and Doom on all enemies.
Esuna	None	Magic	Single Target	—	—	100	25	10 MP	Modus Nemea, first four attack pairs	Cure all status ailments other than KO.
Dispelga	None	Magic	AoE	—	—	100	0	42 MP	Modus Nemea, first four attack pairs	Remove buffs from all enemies.
Bravery	None	Magic	Single Target	—	—	100	25	6 MP	Modus Infernus, first four attack pairs After the fourth pair in the final HP phase	Increase physical attack of an ally.
Faith	None	Magic	Single Target	—	—	100	25	6 MP	Modus Cocytus, first four attack pairs After the fourth pair in the final HP phase	Increase magic attack of an ally.
Deprotega	None	Magic	AoE	—	—	100	25	24 MP	Modus Infernus, first four attack pairs	Black magic. Lowers all enemies' physical defense. Ultima Weapon variant.
Deshellga	None	Magic	AoE	—	—	100	25	24 MP	Modus Cocytus, first four attack pairs	Black magic. Lowers all enemies' magic defense. Ultima Weapon variant.
Gravija	None	Magic	AoETarget Cur HPRatio	—	1	500	0	75 MP	Modus Cocytus, first four attack pairs	Reduce the current HP of all enemies by 75%.
Curaga	None	Magic	Single Target	1500	1	100	60	50 MP	Modus Nemea, first four attack pairs	Healing: fully restores HP.
Holy	Light	Magic	Single Target	80	1	100	40	63 MP	Modus Nemea, first four attack pairs	Deal light magic damage.
Waterga	Water	Magic	AoE	24	3	100	15	44 MP	Modus Nemea, first four attack pairs	Deal water-type magic damage.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Modus Cocytus, first four attack pairs	Deal dark magic damage.
Laser	Light	Magic	Single Target	18	1	100	25	—	Modus Nemea, first four attack pairs	—
Sandstorm	Earth	Physical	AoE	12	2	100	12	—	Modus Infernus, first four attack pairs	Effects: Accuracy Variation. Open the ability for details.
Firestorm	Fire	Physical	AoE	18	1	100	12	—	Modus Infernus, first four attack pairs	—
Atomic Ray	Fire	Physical	Single Target	24	1	100	25	—	Modus Infernus, first four attack pairs	—
Mighty Guard	None	—	AoE	—	—	—	—	—	Modus Nemea, first four attack pairs After the fourth pair in the final HP phase	Effects: Defense. Open the ability for details.
Blizzard Beam	Ice	Magic	Single Target	18	1	100	25	—	Modus Cocytus, first four attack pairs	—
Blizzaga Barrage	Ice	Magic	Single Target	60	3	100	0	—	Modus Cocytus, first four attack pairs	Deals Ice magic damage. Ultima Weapon only.
Syphon Barrage	None	Magic	Single Target	100	4	100	0	—	Modus Cocytus, first four attack pairs	Absorbs MP. Ultima Weapon only.
Full power!	None	Physical	Single Target	30	1	100	0	—	Modus Infernus, first four attack pairs	Full Power! Ultima Weapon variant.
Mighty Aura	None	—	Self	—	—	—	—	—	Modus Nemea, first four attack pairs	Bravery and Faith. Ultima Weapon variant.
Recuperate	None	—	AoE	—	—	—	—	—	Modus Nemea, first four attack pairs	Restores the stagger gauge. Ultima Weapon only.
Thwack	None	Physical	AoE	12	4	100	12	—	Modus Infernus, first four attack pairs	—
Negation	None	—	All Units	—	—	—	—	—	Modus Nemea, first four attack pairs	Effects: Cure Status Condition. Open the ability for details.
Execution	Dark	Magic	AoE	36	3	500	12	—	Modus Cocytus, first four attack pairs	—

Traits & Passives

Shifts between different modes.

Frequently uses status ailment attacks.

Double Action (unlimited)
Allows two 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": 2089,
  "table": "DT_UnitParameter",
  "row": "アルテマウェポン（ケラウノス）",
  "offset": 338558,
  "faceIconId": 592,
  "dropNormalRate": 1,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 70 · BOSS

HP: 3,900,000
MP: 9,999
Stagger: 5,000
Strength: 3,840
Stamina: 650
Magic: 1,024
Spirit: 650
Speed: 500

300,000 EXP · 99,999 gil

Plan your approach

Recorded elemental weaknesses: Fire, 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

Fire−50%

Ice50%

Wind0%

Earth0%

Lightning0%

Water0%

Light−50%

Dark50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis100%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow100%

Strength down100%

Stamina down100%

Magic down0%

Spirit down0%

Instant death100%

Gravity100%

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

Drops

Normal

Megalixir100%

RareNone

Steals

NormalNone

RareNone

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

Attack Pattern

Follows a different attack pattern in each mode. Ultima Weapon changes mode after the pattern ends, then starts changing after every two attacks in Ultima Weapon’s final HP phase.

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

When	Action
At the start of the fight	Starts in Modus Infernus. Each mode follows the attack pairs below, then uses Ultima Beam before changing mode.
Modus Infernus, first four attack pairs	Slam then Thwack; a buff move then Atomic Ray; Sandstorm then Firestorm; a buff move then Full power!. The buff move is Bravery if Ultima Weapon’s side lacks ATK up, otherwise Deprotega.
Modus Keraunos, first four attack pairs	Paralysis Slash then an equal choice of Throat Strike or Sleep Slash; Obsidian Vortex then an equal choice of Bioblaster or Slowga; Flash then an equal choice of Berserk or Stun Slash; Mind Blast then Disaster.
Modus Cocytus, first four attack pairs	Gravija then a 50% chance of Syphon Barrage, otherwise the MAG-buff move; MAG-buff move then Darkga; Gravija then Blizzard Beam; Execution then Blizzaga Barrage. The buff move is Faith if Ultima Weapon’s side lacks MAG up, otherwise Deshellga.
Modus Nemea, first four attack pairs	Negation then Laser; Waterga then Dispelga if the party has a buff Ultima Weapon can remove, otherwise Curaga; Esuna if Ultima Weapon has Poison, Blind, Paralysis, a lowered main stat, increased Break damage taken, or Tactical Assault, otherwise Recuperate, then Holy; Mighty Guard then Mighty Aura.
After the four attack pairs, before the final HP phase	Use Ultima Beam, then change mode: 85% chance to take the next mode in Infernus → Keraunos → Cocytus → Nemea → Infernus, or 15% to skip ahead one extra place. Start the new mode from the first pair.
At 30% HP or less, after Colossal Energy Draw	After every two attacks, randomly choose one of the four modes, with an equal chance for each. Keep the same place in the longer pattern; the new mode can be the one already in use.
After the fourth pair in the final HP phase	Use Ultima Beam and then Bravery in Infernus, Slowga in Keraunos, Faith in Cocytus, or Mighty Guard in Nemea. Return to the first pair and randomly choose a mode.
When Blizzaga Barrage or Syphon Barrage executes	Use that skill twice in a row. Berserk aims for someone who does not already have Berserk.

Pattern Changes

At 70% HP or less, or when Ultima Weapon recovers from Ultima Weapon’s first Break, use Colossal Energy Draw. Reaching 30% HP or less afterward starts the faster mode changes.
When Ultima Weapon recovers from Break, jump to Ultima Beam as Ultima Weapon’s next attack.

Fight Details

In Cocytus, using Faith as the second move makes Ultima Weapon repeat the opening pair. Syphon Barrage or Deshellga lets Ultima Weapon continue.

Combat Actions


Slam	None	Physical	Single Target	12	1	100	25	—	Modus Infernus, first four attack pairs	—
Ultima Beam	None	Magic	AoE	48	1	500	12	—	At the start of the fight After the four attack pairs, before the final HP phase 1 more After the fourth pair in the final HP phase	—
Modus Infernus	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to physical mode. Ultima Weapon only.
Modus Keraunos	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to disruption mode. Ultima Weapon only.
Modus Cocytus	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to magic mode. Ultima Weapon only.
Modus Nemea	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to healing mode. Ultima Weapon only.
Colossal Energy Draw	None	—	AoE	—	—	—	—	—	Used in the special responses described above.	An enormous amount of energy is gathering... Ultima Weapon only.
Gravija	None	Magic	AoETarget Cur HPRatio	—	1	500	0	75 MP	Modus Cocytus, first four attack pairs	Reduce the current HP of all enemies by 75%.
Syphon Barrage	None	Magic	Single Target	100	4	100	0	—	Modus Cocytus, first four attack pairs	Absorbs MP. Ultima Weapon only.
Faith	None	Magic	Single Target	—	—	100	25	6 MP	Modus Cocytus, first four attack pairs After the fourth pair in the final HP phase	Increase magic attack of an ally.
Deshellga	None	Magic	AoE	—	—	100	25	24 MP	Modus Cocytus, first four attack pairs	Black magic. Lowers all enemies' magic defense. Ultima Weapon variant.
Blizzard Beam	Ice	Magic	Single Target	18	1	100	25	—	Modus Cocytus, first four attack pairs	—
Execution	Dark	Magic	AoE	36	3	500	12	—	Modus Cocytus, first four attack pairs	—
Blizzaga Barrage	Ice	Magic	Single Target	60	3	100	0	—	Modus Cocytus, first four attack pairs	Deals Ice magic damage. Ultima Weapon only.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Modus Cocytus, first four attack pairs	Deal dark magic damage.
Esuna	None	Magic	Single Target	—	—	100	25	10 MP	Modus Nemea, first four attack pairs	Cure all status ailments other than KO.
Dispelga	None	Magic	AoE	—	—	100	0	42 MP	Modus Nemea, first four attack pairs	Remove buffs from all enemies.
Bravery	None	Magic	Single Target	—	—	100	25	6 MP	Modus Infernus, first four attack pairs After the fourth pair in the final HP phase	Increase physical attack of an ally.
Slowga	None	Magic	AoE	—	—	100	0	24 MP	Modus Keraunos, first four attack pairs After the fourth pair in the final HP phase	Decrease speed of all enemies.
Deprotega	None	Magic	AoE	—	—	100	25	24 MP	Modus Infernus, first four attack pairs	Black magic. Lowers all enemies' physical defense. Ultima Weapon variant.
Curaga	None	Magic	Single Target	1500	1	100	60	50 MP	Modus Nemea, first four attack pairs	Healing: fully restores HP.
Holy	Light	Magic	Single Target	80	1	100	40	63 MP	Modus Nemea, first four attack pairs	Deal light magic damage.
Waterga	Water	Magic	AoE	24	3	100	15	44 MP	Modus Nemea, first four attack pairs	Deal water-type magic damage.
Throat Strike	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Skill Unavailable. Open the ability for details.
Laser	Light	Magic	Single Target	18	1	100	25	—	Modus Nemea, first four attack pairs	—
Sandstorm	Earth	Physical	AoE	12	2	100	12	—	Modus Infernus, first four attack pairs	Effects: Accuracy Variation. Open the ability for details.
Firestorm	Fire	Physical	AoE	18	1	100	12	—	Modus Infernus, first four attack pairs	—
Atomic Ray	Fire	Physical	Single Target	24	1	100	25	—	Modus Infernus, first four attack pairs	—
Sleep Slash	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Paralysis Slash	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Mind Blast	Lightning	Magic	Single Target	24	1	100	25	—	Modus Keraunos, first four attack pairs	Inflicts Paralysis, Poison and Silence on one enemy.
Flash	None	Physical	AoE	—	—	100	12	—	Modus Keraunos, first four attack pairs	Inflicts Blind on all enemies.
Mighty Guard	None	—	AoE	—	—	—	—	—	Modus Nemea, first four attack pairs After the fourth pair in the final HP phase	Effects: Defense. Open the ability for details.
Bioblaster	None	Magic	AoE	12	1	100	12	—	Modus Keraunos, first four attack pairs	Effects: Parameter Variation. Open the ability for details.
Stun Slash	None	Physical	Single Target	12	1	100	25	—	Modus Keraunos, first four attack pairs	Deal physical damage and inflict Paralysis.
Full power!	None	Physical	Single Target	30	1	100	0	—	Modus Infernus, first four attack pairs	Full Power! Ultima Weapon variant.
Mighty Aura	None	—	Self	—	—	—	—	—	Modus Nemea, first four attack pairs	Bravery and Faith. Ultima Weapon variant.
Recuperate	None	—	AoE	—	—	—	—	—	Modus Nemea, first four attack pairs	Restores the stagger gauge. Ultima Weapon only.
Thwack	None	Physical	AoE	12	4	100	12	—	Modus Infernus, first four attack pairs	—
Disaster	None	—	AoE	—	—	—	—	—	Modus Keraunos, first four attack pairs	Has a chance to inflict Blind, Silence, Confusion and Doom on all enemies.
Negation	None	—	All Units	—	—	—	—	—	Modus Nemea, first four attack pairs	Effects: Cure Status Condition. Open the ability for details.
Obsidian Vortex	None	—	AoE	—	—	—	—	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Berserk	None	—	Single Target	—	—	—	—	—	Modus Keraunos, first four attack pairs When Blizzaga Barrage or Syphon Barrage executes	Cast Berserk on an enemy.

Traits & Passives

Shifts between different modes.

Has high magic attack.

Double Action (unlimited)
Allows two 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": 2090,
  "table": "DT_UnitParameter",
  "row": "アルテマウェポン（コキュートス）",
  "offset": 339183,
  "faceIconId": 592,
  "dropNormalRate": 1,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}

LEVEL 70 · BOSS

HP: 3,900,000
MP: 9,999
Stagger: 5,000
Strength: 3,840
Stamina: 650
Magic: 1,024
Spirit: 650
Speed: 500

300,000 EXP · 99,999 gil

Plan your approach

Recorded elemental weaknesses: Lightning, Dark

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%

Lightning−50%

Water50%

Light50%

Dark−50%

Status resistance

Poison100%

Blind100%

Sleep100%

Silence100%

Paralysis0%

Confusion100%

Petrify100%

Charm100%

Berserk100%

Doom—

Slow0%

Strength down0%

Stamina down0%

Magic down0%

Spirit down0%

Instant death100%

Gravity100%

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

Drops

Normal

Megalixir100%

RareNone

Steals

NormalNone

RareNone

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

Attack Pattern

Follows a different attack pattern in each mode. Ultima Weapon changes mode after the pattern ends, then starts changing after every two attacks in Ultima Weapon’s final HP phase.

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

When	Action
At the start of the fight	Starts in Modus Infernus. Each mode follows the attack pairs below, then uses Ultima Beam before changing mode.
Modus Infernus, first four attack pairs	Slam then Thwack; a buff move then Atomic Ray; Sandstorm then Firestorm; a buff move then Full power!. The buff move is Bravery if Ultima Weapon’s side lacks ATK up, otherwise Deprotega.
Modus Keraunos, first four attack pairs	Paralysis Slash then an equal choice of Throat Strike or Sleep Slash; Obsidian Vortex then an equal choice of Bioblaster or Slowga; Flash then an equal choice of Berserk or Stun Slash; Mind Blast then Disaster.
Modus Cocytus, first four attack pairs	Gravija then a 50% chance of Syphon Barrage, otherwise the MAG-buff move; MAG-buff move then Darkga; Gravija then Blizzard Beam; Execution then Blizzaga Barrage. The buff move is Faith if Ultima Weapon’s side lacks MAG up, otherwise Deshellga.
Modus Nemea, first four attack pairs	Negation then Laser; Waterga then Dispelga if the party has a buff Ultima Weapon can remove, otherwise Curaga; Esuna if Ultima Weapon has Poison, Blind, Paralysis, a lowered main stat, increased Break damage taken, or Tactical Assault, otherwise Recuperate, then Holy; Mighty Guard then Mighty Aura.
After the four attack pairs, before the final HP phase	Use Ultima Beam, then change mode: 85% chance to take the next mode in Infernus → Keraunos → Cocytus → Nemea → Infernus, or 15% to skip ahead one extra place. Start the new mode from the first pair.
At 30% HP or less, after Colossal Energy Draw	After every two attacks, randomly choose one of the four modes, with an equal chance for each. Keep the same place in the longer pattern; the new mode can be the one already in use.
After the fourth pair in the final HP phase	Use Ultima Beam and then Bravery in Infernus, Slowga in Keraunos, Faith in Cocytus, or Mighty Guard in Nemea. Return to the first pair and randomly choose a mode.
When Blizzaga Barrage or Syphon Barrage executes	Use that skill twice in a row. Berserk aims for someone who does not already have Berserk.

Pattern Changes

At 70% HP or less, or when Ultima Weapon recovers from Ultima Weapon’s first Break, use Colossal Energy Draw. Reaching 30% HP or less afterward starts the faster mode changes.
When Ultima Weapon recovers from Break, jump to Ultima Beam as Ultima Weapon’s next attack.

Fight Details

In Cocytus, using Faith as the second move makes Ultima Weapon repeat the opening pair. Syphon Barrage or Deshellga lets Ultima Weapon continue.

Combat Actions


Slam	None	Physical	Single Target	12	1	100	25	—	Modus Infernus, first four attack pairs	—
Ultima Beam	None	Magic	AoE	48	1	500	12	—	At the start of the fight After the four attack pairs, before the final HP phase 1 more After the fourth pair in the final HP phase	—
Modus Infernus	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to physical mode. Ultima Weapon only.
Modus Keraunos	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to disruption mode. Ultima Weapon only.
Modus Cocytus	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to magic mode. Ultima Weapon only.
Modus Nemea	None	—	Self	—	—	—	—	—	Listed in the game files; no trigger was found in this AI.	Switches to healing mode. Ultima Weapon only.
Colossal Energy Draw	None	—	AoE	—	—	—	—	—	Used in the special responses described above.	An enormous amount of energy is gathering... Ultima Weapon only.
Negation	None	—	All Units	—	—	—	—	—	Modus Nemea, first four attack pairs	Effects: Cure Status Condition. Open the ability for details.
Laser	Light	Magic	Single Target	18	1	100	25	—	Modus Nemea, first four attack pairs	—
Waterga	Water	Magic	AoE	24	3	100	15	44 MP	Modus Nemea, first four attack pairs	Deal water-type magic damage.
Curaga	None	Magic	Single Target	1500	1	100	60	50 MP	Modus Nemea, first four attack pairs	Healing: fully restores HP.
Dispelga	None	Magic	AoE	—	—	100	0	42 MP	Modus Nemea, first four attack pairs	Remove buffs from all enemies.
Esuna	None	Magic	Single Target	—	—	100	25	10 MP	Modus Nemea, first four attack pairs	Cure all status ailments other than KO.
Recuperate	None	—	AoE	—	—	—	—	—	Modus Nemea, first four attack pairs	Restores the stagger gauge. Ultima Weapon only.
Holy	Light	Magic	Single Target	80	1	100	40	63 MP	Modus Nemea, first four attack pairs	Deal light magic damage.
Mighty Guard	None	—	AoE	—	—	—	—	—	Modus Nemea, first four attack pairs After the fourth pair in the final HP phase	Effects: Defense. Open the ability for details.
Mighty Aura	None	—	Self	—	—	—	—	—	Modus Nemea, first four attack pairs	Bravery and Faith. Ultima Weapon variant.
Bravery	None	Magic	Single Target	—	—	100	25	6 MP	Modus Infernus, first four attack pairs After the fourth pair in the final HP phase	Increase physical attack of an ally.
Faith	None	Magic	Single Target	—	—	100	25	6 MP	Modus Cocytus, first four attack pairs After the fourth pair in the final HP phase	Increase magic attack of an ally.
Slowga	None	Magic	AoE	—	—	100	0	24 MP	Modus Keraunos, first four attack pairs After the fourth pair in the final HP phase	Decrease speed of all enemies.
Deprotega	None	Magic	AoE	—	—	100	25	24 MP	Modus Infernus, first four attack pairs	Black magic. Lowers all enemies' physical defense. Ultima Weapon variant.
Deshellga	None	Magic	AoE	—	—	100	25	24 MP	Modus Cocytus, first four attack pairs	Black magic. Lowers all enemies' magic defense. Ultima Weapon variant.
Gravija	None	Magic	AoETarget Cur HPRatio	—	1	500	0	75 MP	Modus Cocytus, first four attack pairs	Reduce the current HP of all enemies by 75%.
Darkga	Dark	Magic	AoE	24	3	100	21	44 MP	Modus Cocytus, first four attack pairs	Deal dark magic damage.
Throat Strike	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Skill Unavailable. Open the ability for details.
Sandstorm	Earth	Physical	AoE	12	2	100	12	—	Modus Infernus, first four attack pairs	Effects: Accuracy Variation. Open the ability for details.
Firestorm	Fire	Physical	AoE	18	1	100	12	—	Modus Infernus, first four attack pairs	—
Atomic Ray	Fire	Physical	Single Target	24	1	100	25	—	Modus Infernus, first four attack pairs	—
Sleep Slash	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Paralysis Slash	None	Physical	Single Target	18	1	100	25	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Mind Blast	Lightning	Magic	Single Target	24	1	100	25	—	Modus Keraunos, first four attack pairs	Inflicts Paralysis, Poison and Silence on one enemy.
Flash	None	Physical	AoE	—	—	100	12	—	Modus Keraunos, first four attack pairs	Inflicts Blind on all enemies.
Bioblaster	None	Magic	AoE	12	1	100	12	—	Modus Keraunos, first four attack pairs	Effects: Parameter Variation. Open the ability for details.
Blizzard Beam	Ice	Magic	Single Target	18	1	100	25	—	Modus Cocytus, first four attack pairs	—
Stun Slash	None	Physical	Single Target	12	1	100	25	—	Modus Keraunos, first four attack pairs	Deal physical damage and inflict Paralysis.
Blizzaga Barrage	Ice	Magic	Single Target	60	3	100	0	—	Modus Cocytus, first four attack pairs	Deals Ice magic damage. Ultima Weapon only.
Syphon Barrage	None	Magic	Single Target	100	4	100	0	—	Modus Cocytus, first four attack pairs	Absorbs MP. Ultima Weapon only.
Full power!	None	Physical	Single Target	30	1	100	0	—	Modus Infernus, first four attack pairs	Full Power! Ultima Weapon variant.
Thwack	None	Physical	AoE	12	4	100	12	—	Modus Infernus, first four attack pairs	—
Disaster	None	—	AoE	—	—	—	—	—	Modus Keraunos, first four attack pairs	Has a chance to inflict Blind, Silence, Confusion and Doom on all enemies.
Execution	Dark	Magic	AoE	36	3	500	12	—	Modus Cocytus, first four attack pairs	—
Obsidian Vortex	None	—	AoE	—	—	—	—	—	Modus Keraunos, first four attack pairs	Effects: Automatic Skill. Open the ability for details.
Berserk	None	—	Single Target	—	—	—	—	—	Modus Keraunos, first four attack pairs When Blizzaga Barrage or Syphon Barrage executes	Cast Berserk on an enemy.

Traits & Passives

Shifts between different modes.

Frequently uses healing and buffs.

Uses a skill that restores stagger gauge.

Double Action (unlimited)
Allows two actions.
Healing Magic +10%
Increases potency of healing magic by 10%.
Healing Magic +20%
Increases potency of healing magic by 20%.
Healing Magic +30%
Increases potency of healing magic by 30%.
Magic Healing +200%
None

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": 2091,
  "table": "DT_UnitParameter",
  "row": "アルテマウェポン（ネメアー）",
  "offset": 339808,
  "faceIconId": 592,
  "dropNormalRate": 1,
  "dropRareRate": 30,
  "stealRate": 5,
  "battleGroups": []
}