Fire Emblem Heroes Wiki
Bat Fang
Move type Flying
Weapon type Red Beast Blue Beast Green Beast Colorless Beast
Might 14
Range 1
Required Adult (Flier)
SP 400
Exclusive? Yes
String ID SID_蝙蝠の爪牙
Numeric ID 3107
Description Grants Spd+3. At start of combat, if unit's HP ≥ 25%, grants Atk/Spd+6 to unit during combat, and also, if unit's Spd > foe's Spd, deals damage = 70% of difference between stats. (Maximum bonus of +7 damage.) 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, unit can move 1 extra space. (That turn only. Does not stack.) If unit transforms, grants Atk+2.


  • The stat increase that can be applied by Bat Fang is considered a temporary buff.
  • The maximum Spd difference that matters for Bat Fang's damage bonus is 10, due to Bat Fang's cap of 7 bonus damage.
  • The minimum Spd difference that matters for Bat Fang's damage bonus is 2, which provides 1 bonus damage.
  • The bonus damage from Bat Fang is applied after other effects, and is thus not boosted by specials such as Skilliconspecial.png Glimmer or Skilliconspecial.png Astra.
  • With Phantom Spd 3.png Phantom Spd 3, Bat Fang will deal extra damage if the user would otherwise have equal or less Res than the target.
    • This effect stops when the user is regularly 9 Spd slower than the target, as a 1-Spd advantage rounds down to zero damage.
  • Beast refers to .
  • Dragon refers to .
  • Bat Fang applies the  Mobility increased status effect.
    • Any 【Bonus】 on a unit lasts until the start of that unit's next phase. If  Mobility increased is acquired during the enemy phase, it will disappear when the next player phase begins.
    •  Gravity and  Stall will negate the effects of Mobility increased.
  • The Atk+2 granted by Bat Fang when the user transforms is a stat boost, not a  bonus.
    • The stat boost and  Mobility increased effects of Bat Fang will only trigger if the unit is transformed.

List of owners[]

UnitSkill chain
Blue Bat Face FC.webp
Bat Fang
Green Bat Face FC.webp
Bat Fang
Red Bat Face FC.webp
Bat Fang


  • Bat Fang is the first exclusive  Beast weapon that is available to generic units.

In other languages[]

Language Name
Japanese 蝙蝠の爪牙
German Fledermauszahn
Spanish (Europe) Colmillo vampiro
Spanish (Latin America) Colmillo vampiro
French Croc chiroptère
Italian Zanna pipistrello
Traditional Chinese (Taiwan) 蝙蝠的爪牙
Portuguese Presa morcego

See also[]