Unchain The Dead

Alteration-Exile three cards from your
graveyard, {1}{u}(You may exile three cards from
your graveyard and pay {1}{u} as an additional cost
to cast this spell. If you do, exile it with an
alteration counter on it as it resolves.)

As long as this card is exiled with an alteration
counter on it, Zombies you control have ward {1}.

Create a 2/2 black Zombie creature token.