Type	Icon	Name	SP	Required	Description 【Switch】
B		Def/Res Shackle	300	Chill Def/Res 2	At start of turn, and after unit acts (if Canto triggers, after Canto), inflicts【Def Shackle】 and【Res Shackle】on closest foes and foes within 2 spaces of those foes through their next actions. Inflicts Def/Res-4 on foe and deals damage = number of【Penalty】effects active on foe, excluding stat penalties, × 2, + 7 during combat (max 15; excluding area-of-effect Specials).	At start of turn, and after unit acts (if Canto triggers, after Canto), inflicts【Def Shackle】 and【Res Shackle】on closest foes and foes within 2 spaces of those foes through their next actions. Inflicts Def/Res-4 on foe and deals damage = number of【Penalty】effects active on foe, excluding stat penalties, × 2, + 7 during combat (max 15; excluding area-of-effect Specials). 【Def Shackle】 Inflicts penalty on unit's Def during combat = number of【Penalty】effects active on unit + 4, excluding stat penalties (max 8; through unit's next action). 【Res Shackle】 Inflicts penalty on unit's Res during combat = number of【Penalty】effects active on unit + 4, excluding stat penalties (max 8; through unit's next action). 【Penalty】 All effects that last "on foe through its next action." Includes penalties inflicted by a skill like Panic or Threaten and negative status effects (preventing counterattacks, restricting movement, or the effects of a skill like Triangle Adept or Guard).
Cannot use:

Effects

Effects	Targets	Conditions
Status effects
Def Shackle	Closest  Foes &  Foes within 2 spaces of those  Foes	At start of turn, after action(s) & Canto movement
Res Shackle
Combat effects
Def/Res-4	Foe	—
Boosts damage by X (max: 15) X = 2 x 【Penalty】 effects active on  Foe, +7 (exc.  Penalties)	Unit

Notes

• Def/Res Shackle applies the  Def Shackle status effect.
  • Any 【Penalty】 effect on a unit lasts until that unit takes an action. If the unit takes multiple actions in a turn, they will only have  Def Shackle for their first action.
  • The stat reduction that can be applied during combat by  Def Shackle is considered a temporary debuff.
  • The temporary debuffs of  Def Shackle will activate if the foe receives a 【Penalty】 effect (excluding  Penalties).
    • The temporary debuffs will not be negated if the foe receives a 【Bonus】 effect.
    • If the foe does not receive a 【Penalty】 effect (excluding  Penalties), or has their 【Penalty】 effect removed by a source of Penalty effect removal, the temporary debuffs will be negated.
    • For more information, see Status effects.
• Def/Res Shackle applies the  Res Shackle status effect.
  • Any 【Penalty】 effect on a unit lasts until that unit takes an action. If the unit takes multiple actions in a turn, they will only have  Res Shackle for their first action.
  • The stat reduction that can be applied during combat by  Res Shackle is considered a temporary debuff.
  • The temporary debuffs of  Res Shackle will activate if the foe receives a 【Penalty】 effect (excluding  Penalties).
    • The temporary debuffs will not be negated if the foe receives a 【Bonus】 effect.
    • If the foe does not receive a 【Penalty】 effect (excluding  Penalties), or has their 【Penalty】 effect removed by a source of Penalty effect removal, the temporary debuffs will be negated.
    • For more information, see Status effects.
• The stat reduction that can be applied during combat by Def/Res Shackle is considered a temporary debuff.

• The damage boosting effect is a flat +X (max: 15) damage that ignores the foe's Def or Res when calculating the damage boost, and 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 damage boost of Def/Res Shackle will activate if the foe receives a 【Penalty】 effect.
  • The damage boost will not be negated if the foe receives a 【Bonus】 effect.
  • If the foe does not receive a 【Penalty】 effect, or has their 【Penalty】 effect removed by a source of Penalty effect removal, the damage boost will be negated.
  • For more information, see Status effects.

List of owners

Unit	Skill chain
Alfaðör: Celestial King	Chill Res 1 5	Chill Def/Res 1 5	Chill Def/Res 2 5	Def/Res Shackle 5
Seiðr: Goddess of Hope	Chill Res 1 5	Chill Def/Res 1 5	Chill Def/Res 2 5	Def/Res Shackle 5

Availability

Summoning events

Start	End	Event	Skill
2025-11-17	2025-12-05	Focus: Double Mythic Heroes	Def/Res Shackle
2026-01-12	2026-01-26	Legendary & Mythic Hero Remix 1	Def/Res Shackle
2026-01-29	2026-02-16	Emblem Byleth & Legendary Elise	Def/Res Shackle
2026-03-30	2026-04-17	Emblem Lucina: Of Awakening	Def/Res Shackle
2026-05-13	2026-05-27	Legendary & Mythic Hero Remix 1	Def/Res Shackle

Distributed units

• This skill is not available on any distributed units.

Combat Manuals

• This skill has not been available on any distributed Combat Manuals.

In other languages

Language	Name
English (US)	Def/Res Shackle
Japanese	守備魔防の枷
German	Ver./Res.-Ketten
Spanish (Europe)	Grillete Def/Res
Spanish (Latin America)	Grillete Def./Res.
French	Déf/Rés entravées
Italian	Frena Dif/Res
Traditional Chinese (Taiwan)	防守魔防枷鎖
Portuguese	Def./Res. cativa

See also

• Shackle Passives