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 graveyard” and gains “enchant creature put onto
the battlefield with this Aura.” Return enchanted creature 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.