Returned Horde

Other Zombies you control get +1/+1 and enter the battlefield untapped.
{b}{t}: Exile a card from any graveyard. If the exiled card was a creature, put a 2/2 black Zombie token onto the battlefield. If the exiled card was a land, add {b}{b} to your mana pool. If it is any other type of card, Draw a card and lose one life.