Toran, the Mutilator

Whenever you cast a red or green spell, put a
+1/+1 counter on Toran, the Mutilator.
Whenever a creature you control attacks a player
or planeswalker, Toran, the Mutilator deals X
damage to that player or planeswalker, where X
is Toran's Power.
Toran has been know to do many vile things.
Including having made a literal mountain of corpses