Animate Dead

Enchant creature card in a graveyard

When this Aura enters, if it's on the
battlefield, it loses "enchant creature card in a grave-
yard" and gains "enchant creature put onto the
battlefield with this Aura." Return enchanted crea-
ture card to the battlefield under your control and
attach this Aura to it. When this Aura leaves the
battlefield, that creature's controller sacrifices it.

Enchanted creature gets -1/-0.