Army of damned

At the beginning of your upkeep, create a 2/2 black zombie token.
Whenever a zombie you control dies, creatures your opponent control get -1/-1 until end of turn. For each creature that dies this way, draw a card then discard a card.
{3}{b}{b}{t} Sacrifice Army of damned. Return all zombies from you graveyard to the battlefield. For the rest of the game if a zombie would die exile it instead.