Storrev's Influence

Dominate — Whenever a creature you don't
control dies, you may sacrifice a creature. If you
do, put a revival counter on the sacrificed creature
(this counter stays on that creature for as long as it
remains in your graveyard)and you may return a creature card from your graveyard to your hand.
{x}{x}{b}{g}: Return any number of creatures cards
with revival counters on them from your
graveyard to the battlefield. X is equal to their combined converted mana costs.