Uurorrak, Chosen of Nuganao

Haste, menace
Whenever Uurorrak, Chosen of Nuganao attacks,
you may choose a Gnoll creature card in your
graveyard, and return that creature to the
battlefield tapped and attacking. If you do, you
lose life equal to that creature's power.
{b}{r}, Pay 2 life: Draw four cards, then discard a
card unless an opponent lost life this turn.