Za'rel, Collector of Bones

Collapse 2 (This card enters the battlefield
with two form counters on it. At the end step, if
there are no form counters on this card, sacrifice
it)
At the beginning of your upkeep you may return
target creature from your graveyard to your hand.
If you do, remove a form counter from this card.
Whenever a creature dies you may put a form
counter on this card.