Sul'Gath, Chaos Incarnate

Flying, Trample, Lifelink, Indestructible
When Sul'Gath, Chaos Incarnate enters the battlefield, you may reduce your life total to 6.
If you do, each player must lose X life unless they Sacrifice X nontoken permanents or Discard X
Cards, where X is the difference between your
life total at the start of the turn and 6.