The Ravager of Worlds

+2: If an opponent has 10 or less life, create 3 1/1 eldrazi tokens. If you have 10 or less life, your opponents lose 4 life and you gain 4 life
-3: If an opponent has 10 or less life, exile target permanent. If you have 10 or less life, create a 4/4 demon token with flying and lifelink.
-7: If an opponent has 10 or less life, exile all colored permanents. If you have 10 or less life create an emblem with Your life total can't change