Animate Dead

Enchant creature card in a graveyard
When Animate Dead enters the battlefield, if it's
on the battlefield, it loses "enchant creature card
in a graveyard" and gains "enchant creature put
onto the battlefield with Animate Dead." Return
enchanted creature card to the battlefield under
your control and attach Animate Dead to it.
When Animate Dead leaves the battlefield,
that creature's controller sacrifices it.
Enchanted Creature gets -1/-0.