Enchant creature card in a graveyard. When Animate Dead enters the battefield, if it's on the batefield, it loses "enchant creature card in a graveyard" and gains "enchant creature put onto the battefield 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.