Darth Nihilus

Deathtouch, Indestructible
Whenever another creature dies you gain life equal to its toughness and Darth Nihilus
gains a +0/+2 counter. During each upkeep, put a -0/-1 counter on Darth Nihilus.
{x}{b}{b}{b},{t}: Put {x}{x} number of -1/-1 counters on target creature.