Ob Nixilis, Bolas' Secret

+1: Up to one target creature gains afflict 4 until end of turn.
-5: Exile target creature card from your graveyard. Create a token that's a copy of it, except it's a 4/4 black Zombie with flying.
-15: Exile all creatures from all graveyards. Create tokens that are copies of those cards, except they're 4/4 black Zombies.