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.
When Animate Dead leaves the battlefield, that
creature's controller sacrifices it.
Enchanted creature gets -1/-0.