Enchant creature card in a graveyard
When Animate from Bed 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 from Bed." Return enchanted creature card to the battlefield under your control and attach Animate from Bed to it. When Animate from Bed leaves the battlefield, that creature's controller sacrifices it.
Enchanted creature gets -1/-0.