Colossus of Rot

Trample
Whenever one or more permanents are put into a graveyard from the battlefield, put a +1/+1
counter on Colossus of Rot.
Whenever Colossus of Rot or another creature you control dies, if it had any +1/+1 counters on it, target player loses life equal to the number of +1/+1 counters on that creature.