Erivix, the Hellrisen

Flying, first strike, indestructible
Whenever you untap Erivix, the Hellrisen you lose 2 life. If this would bring your life total to 0 or less, sacrifice Erivix, the Hellrisen.
As long as you have 10 or less life, you can't lose the game and your opponents can't win the game.
{b}: You lose 2 life.