Wenfeir, Specter of Venowef

This spell costs {1} less to cast for each creature card in your graveyard. For each {1} this spell's mana cost is reduced by this way, target opponent creates a 2/2 black Zombie creature token.
Ward—Pay 1 life for each creature you control.
Wenfeir, Specter of Venowef can't be blocked as long as defending player controls a Zombie.