Not Creatures, Bones

Whenever a creature is put into the graveyard from anywhere, return it to the battlefield under your control at the beginning of the next end step.

Whenever a creature enters under your control put a bone counter on Not Creatures, Bones.

Creatures you control get -1/-1 for each bone counter on Not Creatures, Bones.

{p/b}{p/b}: Remove a bone counter from Not Creatures, Bones.