Azazel, king of the dead

: All creatures you control gain undying. When Azazel, king of the dead dies return him to the battlefield with 1 loyalty counter.
+2: Exile up to 4 non-land cards from anywhere. If do you do lose life equal to their converted mana costs exiled and each opponent gains 3 life.
-15: You may cast all cards exiled with Azazel, king of the dead without paying there mana costs.