Liliana, the Veil's Queen

: This card transforms from and into Liliana, Mistress of the Veil
+1: Exile target card from a graveyard. If it's a creature card, create a token that's a copy of it, except it's a 2/2 black Zombie.
-12: Exile all cards from all graveyards. For every creature, create a token that's a copy of it, except it's a 2/2 black Zombie. Transform this card.