Thyreon, Core of all Evil

+2: Each player sacrifices a colored permanent. Tap target permanent.
-3: Search your library for a card called Thyreon's Nexus and put it into your hand. Shuffle your library after. Target player loses 2 life.
-11: Exile all creature on the battlefield. If you have Thyreon's Nexus in play, you may take an extra turn after this one.