Grorix, Chaos Eater

When this card enters the Battlefield, or when another non-token creature you control dies, mill the top 5 cards of your library, then choose 1 card from among them and exile it.
-If the card was a Land card, add {b}{b} to your Mana Pool.
-If the card was a creature card, create a 2/2 black Zombie creature token with Menace. That token gains the effects of the exiled card.
{1}{b}{b}, Sacrifice a creature, add 1 exiled card to your hand.