Army of the Arkel

Undead spells cost you cast cost {1} less to cast
for each undead creature on the battlefield
(Skeletons, spirits, and zombies are undead.)
{g/w}{t}, Exile target creature card from your graveyard, create a 2/2 black Zombie creature token.
Dreadhorde {w/b}(Sacrifice this creature, return it to the battlefield under your control at your next end step.)
The Arkel raise the dead for a military.