Aezor, Scion of Death

Deathtouch, Haste
Aezor, Scion of Death enters the battlefield with X+1/+1 counters on it, where X is the number of creature cards in all graveyards.
{1}{b}{b}, Discard a card: Return Aezor from your graveyard to the battlefield tapped. If the discarded
card was a black card, then untap Aezor.
"So you thought I was dead? How wrong you were."
-Aezor