Vassal's Blade is a sword exclusive to Karla in Fire Emblem Heroes. While it has a Slaying-type effect, it also increases damage based on the speed difference. The faster Karla is compared to her opponent, 70% of the difference is translated to damage up to +7 extra.
Accelerates Special trigger (cooldown count-1). If unit's Spd > foe's Spd, deals damage equal to 70% of difference between stats. (Maximum bonus of +7 damage. Combos with Phantom Spd.)
|400 SP, 500, 200|
|Grants HP +3. If foe's HP ≥ 75%, grants Atk/Spd+5 and neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat.|
|Accelerates Special trigger (cooldown count-1). If unit initiates combat or is within 2 spaces of an ally, grants Spd+5 to unit during combat and deals damage = 15% of unit's Spd.|
- The weapon's design is based on the sword Karla wields in her artwork from Fire Emblem: The Blazing Blade.