Xarath, Bringer of Death

Vigilance, Deathtouch, Lifelink, Menace
When this creature enters the battlefield, pay X
red or black mana. Then, create X 2/2 red and
black demon creature tokens with Haste and Deathtouch.
Whenever this creature attacks, you may sacrifice
a creature. if you do, it deals damage equal to its
power to any target and you gain that much life.
Sacrifice 3 creatures, return this card from the graveyard to the battlefield.