Nirvana, Fire of Death

Flying, Deathtouch, Planeswalk (Whenever this
creature dies, return it to the battlefield under
the control of an opponent chosen at random)
Whenever a player sacrifices a creature, each
player loses 1 lifeand discards a card, and you
gain 1 life and draw a card.
Sacrifice a creature with X toughness: Return
target creature card with toughness X or less
from your graveyard to your hand.