Fire Emblem Heroes Wiki
Brightmare Horn
Move type Cavalry
Weapon type Red Beast Blue Beast Green Beast Colorless Beast
Might 14
Range 1
Required Adult (Cavalry)
SP 400
Exclusive? Yes
String ID SID_夏夜の悪夢の角
Numeric ID 2645
Description Grants Spd+3. At start of combat, if unit's HP ≥ 25%, grants Atk/Spd/Def/Res+5 during combat, and also, if unit's Spd > foe's Spd, reduces damage from attacks during combat and from area-of-effect Specials (excluding Røkkr area-of-effect Specials) by percentage = difference between stats × 4 (max 40%).

At start of combat, if unit's HP ≥ 25% while transformed, neutralizes effects that prevent unit's follow-up attacks during combat.

At start of turn, if unit is adjacent to only beast or dragon allies or if unit is not adjacent to any ally, unit transforms (otherwise, unit reverts). If unit transforms, grants Atk+2, and if unit initiates combat, inflicts Atk/Def-4 on foe during combat and foe cannot make a follow-up attack.


  • The stat increase that can be applied by Brightmare Horn is considered a combat boost.
  • The damage reduction is calculated after offensive Specials and skills that deal extra damage, such as Icon Class Red Sword.png Wo Dao+.
    • Damage reductions by percentage stack multiplicatively, unlike interactions related to the weapon-triangle, such as gem weapons and  Triangle Adept.
      • For example, if both Icon Class Green Axe.png Urvan and Deflect Magic 1.png Deflect Magic 1 activate, the total damage reduction is 86% instead of 110%, since the two skills reduce the damage to (1 − 80%) × (1 − 30%) = 14% of the original.
    • For more information, see Damage calculation.
  • Icon Skill Special.png Deadeye, Icon Skill Special.png Lethality, Icon Skill Special.png Sublime Heaven, Icon Skill Special.png Twin Blades, and Icon Skill Weapon.png Bow of Frelia with offensive Specials will neutralize Brightmare Horn's damage reduction effect when the special triggers.
  • Icon Class Red Tome.png Þjálfi will reduce the damage reduction of Brightmare Horn's damage reduction effect by 50%.
  • Effects that are disabled by Brightmare Horn:
  • Beast refers to .
  • Dragon refers to .
  • The stat decrease that can be applied by Brightmare Horn is considered a combat reduction.
  • Brightmare Horn can prevent the foe from making a follow-up attack.
  • The Atk+2 granted by Brightmare Horn when the user transforms is a stat boost, not a  bonus.
    • The stat boost, combat reductions, and follow-up preventing effects of Brightmare Horn will only trigger if the unit is transformed.

List of owners[]

UnitSkill chain
Freyja Fleeting Summer Face FC.webp
Whelp (Cavalry)
Yearling (Cavalry)
Adult (Cavalry)
Brightmare Horn

In other languages[]

Language Name
Japanese 夏夜の悪夢の角
German Sommeralbtraum
Spanish (Europe) Cuerno verandilla
Spanish (Latin America) Cuerno pesadilla
French Corne conchemar
Italian Incubicorno
Traditional Chinese (Taiwan) 夏夜惡夢之角
Portuguese Chifre distópico

See also[]