Doom of Malan'tai

At the beginning of your end step, you may exile a creature card from a graveyard that was put there this turn. Doom of Malan'tai gains one of the following:
• +1/+1 if exile card's power is greater than Doom of Malan'tai
• One trigger ability from exile card
• One keyword ability from exile card

Sacrifice another creature: Regenerate Doom of Malan'tai