Averos, Hellborn Bane

+1: Look at the top 5 cards of your library. Put a Demon card into your hand the rest on the bottom of your library in a random order.
-2: You may cast instants and sorceries from your graveyard until end of turn, but if they were to be put into your graveyard, exile them instead.
-10: Exile the top X cards of each opponent's library where X is the total power among demons you control. Demons you control gain Annihilator 3.