Grimtal Ooze

Whenever another nontoken creature dies,
exile it instead and put a +1/+1 counter on
Grimtal Ooze.
Remove a +1/+1 counter from Grimtal Ooze:
Create a 0/2 black Skull creature token.
Remove a +1/+1 counter from Grimtal Ooze:
Skulls you control get +1/+1 until end of turn.