cave of corpses

when a creature dies, put a tomb counter on cave of corpses
{t}: add {b}{b} to your mana pool.
{2}{b}: remove 3 tomb counters on cave of corpses, create a 2/2 black zombie
creature token.
{3}{b}{b}: remove 5 tomb counters on cave of copses, return target creature
from your graveyard to your hand.