Type	Icon	Name	SP	Required	Description 【Switch】
A		Fortifications	300	Fort. Def/Res 2	Inflicts Atk-5. Grants Def/Res+7. If unit is in a space where a Divine Vein effect is applied, unit can counterattack regardless of foe's range. If unit initiates combat, grants Def/Res+6 to unit and reduces damage from foe's Specials by 10 during combat (excluding area-of-effect Specials). If unit has entered combat during the current turn, after unit acts (if Canto triggers, after Canto), applies【Divine Vein (Stone)】to unit's space and spaces within 2 spaces of unit for 1 turn.	Inflicts Atk-5. Grants Def/Res+7. If unit is in a space where a Divine Vein effect is applied, unit can counterattack regardless of foe's range. If unit initiates combat, grants Def/Res+6 to unit and reduces damage from foe's Specials by 10 during combat (excluding area-of-effect Specials). If unit has entered combat during the current turn, after unit acts (if Canto triggers, after Canto), applies【Divine Vein (Stone)】to unit's space and spaces within 2 spaces of unit for 1 turn. 【Divine Vein (Stone)】 Applies the following effects on space for unit and allies: Grants Def/Res+6 during combat, reduces damage from foe's Specials by 10 during combat (excluding area-of-effect Specials), and reduces damage from area-of-effect Specials by 50% (excluding Røkkr area-of-effect Specials). (Divine Vein effects do not stack; replaces any existing Divine Vein effect; Divine Vein effects applied simultaneously cancel each other out. Does not count as defensive terrain.)
Cannot use:

Effects

Effects	Targets	Conditions
Permanent effects
Atk-5,  Def/Res+7	Unit	—
Map effects
【Divine Vein (Stone)】	Spaces within 2 spaces of  Unit	After  Unit's action(s) or (after Canto movement) if  Unit entered combat during the current turn
Combat effects
Counter regardless of range	Unit	Unit is on a Divine Vein space
Def/Res+6		Player Phase
Reduces damage by 10 per  Foe's offensive special

Notes

• "If unit initiates combat" means if the user starts combat during the player phase. The unit does not need to deal damage, nor be the first to attack.
  • However, if the effect is applied after combat, the unit must also survive it to fulfill this condition.
• The stat boost that can be applied during combat by Fortifications is considered a temporary buff.
• The flat damage-reduction effect is a flat -10 damage that is calculated after offensive Specials, damage boosting effects such as  Arcane Thorn and  Change of Fate, and "reduces damage by X%" effects such as  Archrival and  Dodge.
  • If a 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.
  • Flat damage-reduction effects stack additively, similar to damage boosting effects and interactions related to the weapon-triangle, such as  Triangle Adept and the weapon-triangle advantage boost.
  • Flat damage-reduction 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.

•  【Divine Vein (Stone)】 adds effects to spaces regardless of the terrain of those spaces.
  • Divine Vein effects do not stack with each other. if a Divine Vein effect is applied to a space where another Divine Vein effect is active, the previous Divine Vein effect is overwritten.
    • Divine Vein effects applied at the same time cancel each other out, leaving the overlapped spaces without a Divine Vein effect.
  • Divine Vein effects do not apply to spaces with unbreakable walls, unbreakable structures, and other unbreakable terrain.
  •  【Divine Vein (Stone)】 is not considered defensive terrain, so  Queensblade and  Breezy Spear will not disable it's effects.
  • The Def/Res+6 that can be applied during combat by  【Divine Vein (Stone)】 is considered a temporary buff.
  • The flat damage-reduction effect is a flat -10 damage that is calculated after offensive Specials, damage boosting effects such as  Arcane Thorn and  Change of Fate, and "reduces damage by X%" effects such as  Archrival and  Dodge.
    • If a 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.
    • Flat damage-reduction effects stack additively, similar to damage boosting effects and interactions related to the weapon-triangle, such as  Triangle Adept and the weapon-triangle advantage boost.
    • Flat damage-reduction 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.
  • The Area-of-effect Special damage-reduction effect is calculated after Area-of-effect Specials and damage boosting effects that trigger before combat such as  Change of Fate and  Dominance.
    • Røkkr area-of-effect Specials will always deal out of combat damage even if the foe is equipped with 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 both  Dodge and  Spurn 4 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.
    • Non-Special "reduces damage by X%" effects that reduce damage from Area-of-effect Specials can be neutralized or reduced only out of combat.
    • For more information, see Damage calculation.

List of owners

Unit	Skill chain
Alfonse: Heir to Openness	Fortress Def 1 5	Fort. Def/Res 1 5	Fort. Def/Res 2 5	Fortifications 5

Availability

Summoning events

Start	End	Event	Skill
2024-08-16	2024-09-17	New Heroes: In Those We Hope	Fortifications
2024-12-25	2025-01-17	Emblem Lyn: Of Blazing	Fortifications
2025-03-11	2025-03-25	Legendary & Mythic Hero Remix 2	Fortifications
2025-05-02	2025-05-16	GW Hero Fest! CYL: Round 8	Fortifications
2025-07-11	2025-07-18	Revival: In Those We Hope	Fortifications
2025-08-25	2025-09-05	Be Brave, Great Hero!	Fortifications
2025-09-29	2025-10-08	Focus: Alfonse & Veronica's Battle	Fortifications
2026-05-03	2026-05-21	GW: ω CYL Heroes	Fortifications

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
Japanese	野戦築城
German	Befestigungen
Spanish (Europe)	Fortificaciones
Spanish (Latin America)	Fortificaciones
French	Fortifications
Italian	Fortificazioni
Traditional Chinese (Taiwan)	野戰築城
Portuguese	Fortificações

See also

• Counter Passives
• Counter Seals
• Prime Passives
• Weapons with Distant Counter
• Weapons with Close Counter