Name	Cooldown	Description	SP	Required
Boulder	3	Boosts Special damage by 50% of unit's Def when Special triggers. If unit's or foe's Special is ready, or unit's or foe's Special triggered before or during this combat, and also, if unit's Def ≥ foe's Def-4 during combat, reduces damage from foe's next attack by 40% (once per combat; excluding area-of-effect Specials).	500	Bonfire
Cannot use:

Effects

Effects	Targets	Conditions
Combat effects
Boosts damage by X% X = 50% of  Unit's Def	Unit	Special triggers
Reduces damage by 40% from  Foe's next attack		( Unit or  Foe's Special is ready or triggered before or during combat) &  Unit's Def ≥  Foe's Def-4

Notes

• The Special damage boosting effect of Boulder can be reduced by damage-reduction effects such as  Archrival,  A/S Rival Break, and  Dodge.
  • Damage boosting effects stack additively, similar to flat damage-reduction effects and interactions related to the weapon-triangle, such as  Triangle Adept and the weapon-triangle advantage boost.
  • A foe equipped with Invincibility Seals will neutralize all sources of damage except from Røkkr area-of-effect Specials and the minimum 1 damage from Umbra Burst weapons.
  • A foe using attack damage preventing effects can neutralize damage dealt from the foe's own attacks and the unit's attacks (Units with Umbra Burst weapons will take and deal the minimum 1 damage).
  • For more information, see Damage calculation.

• The Special "reduces damage by X%" effect is calculated after offensive Specials and damage boosting effects such as  Arcane Thorn and  Change of Fate.
  • If an effect such as  Miracle or  Roy: Of Binding's boosted Special effect can trigger, the damage-reduction effect will not trigger and the user will still survive with only 1 HP.
  • Umbra Burst weapons will always deal a minimum of 1 damage even if the foe uses attack damage preventing effects, Invincibility Seals, or damage reduction effects.
  • "Reduces damage by X%" effects stack multiplicatively, unlike interactions related to the weapon-triangle, such as  Triangle Adept and the weapon-triangle advantage boost.
    • For example, if the damage-reduction effects from both  Dodge and  Archrival trigger, the maximum total damage-reduction is 64% instead of 80%, since the two skills reduce the damage to (1 − 40%) × (1 − 40%) = 36% of the original damage.
  • Special "reduces damage by X%" effects cannot be neutralized or reduced only during combat by effects such as  Share Spoils+ or  Halves non-Special damage reduction.
  • For more information, see Damage calculation.

List of owners

Unit	Skill chain
Diamant: Gallant Ninja	Glowing Ember 5	Bonfire 5	Boulder 5

Availability

Summoning events

Start	End	Event	Skill
2024-11-06	2024-12-06	Family Ninja Class	Boulder
2025-02-02	2025-03-07	Special Hero Summon	Boulder
2025-05-22	2025-06-05	Focus: Double Special Heroes	Boulder
2025-11-08	2025-11-15	Family Ninja Class	Boulder

Distributed units

• This skill is not available on any distributed units.

Combat Manuals

Start	End	Hero	Currency
2025-03-06T05:00:00Z		Diamant: Gallant Ninja	Divine Code: Part 6

In other languages

Language	Name
Japanese	巨岩
German	Felsbrocken
Spanish (Europe)	Pedrusco
Spanish (Latin America)	Peña
French	Rocher
Italian	Roccia massiccia
Traditional Chinese (Taiwan)	巨岩
Portuguese	Rochedo

See also