Nicol Bolas, Eternal Emperor

Flying Deathtouch Menace

When this card enters the battlefield if it did not enter from the hand or exile creature cards in your graveyard gain eternalize. The eternalize cost is equal to its mana cost.

{b}{r}{u}:Target opponent discards a card, takes 1 damage, and sacrifice a creature.

Eternalize {3}{g/w}({3}{g/w}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Elder Dragon with no mana cost. Eternalize only as a sorcery.)