Phyrexian Grave Crusher

Whenever a creature dies, put a corpse counter on Phyrexian Grave Crusher
{t} Remove 1 Counter from Phyrexian
Grave Crusher: Gain 2 Life
{t} Remove 3 Counters from Phyrexian
Grave Crusher: Draw a Card
{t} Remove 7 Counters from Phyrexian
Grave Crusher: Destroy target permanent