Rolo the Unchained

Haste, Trample

This creature enters the battlefield with three rage counters on it. At the beginning of your end step, remove a rage counter. When the last rage counter is removed you may pay {r}{r}{r}{r} and sacrifice it. If this creature was sacrificed, put four +1/+1 counters on target creature.
When there are no rage counters left on this creature, put it in the graveyard.

"Aaaaaaarrgghh"