Caldera Pyremaw
From Tarkir: Dragonstorm Commander set
Caldera Pyremaw
Creature — Dragon
3/3
Flying
Whenever you cast an instant or sorcery spell, put a +1/+1 counter on this creature. Then this creature deals damage equal to its power to target opponent.
Rulings
- If Caldera Pyremaw leaves the battlefield in response to its ability, use its power the last time it existed on the battlefield to determine how much damage it deals as its ability resolves.