Aamon, Demon of Wrath

Flying, Trample

Whenever Aamon enters the battlefield or attacks, mill the top three cards of your library. You may play one of them this turn.
Whenever an opponent loses life, you may pay {1}{B}{R}. If you do, create a 2/1 black and red Nightmare creature token with menace.

At the beginning of your end step, if you have fewer than three cards in your graveyard, sacrifice Aamon and return Aamon's, Forsaken Pact to the battlefield.