The Last Agni Kai TLA/144

Set: Avatar: The Last Airbender
Collector Code: TLA/144
Name: The Last Agni Kai
Type: Instant
Oracle text: Target creature you control fights target creature an opponent controls. If the creature the opponent controls is dealt excess damage this way, add that much {R}. Until end of turn, you don't lose unspent red mana as steps and phases end.
Rarity: Rare