Hexlore, Plane Eater

+4: Until end of turn, you and permanents you control have hexproof, indestructible, and cannot be sacrificed.
-2: Look through target players library and choose a card from it. You may play that card without paying its mana cost.
-15: For the rest of the game you have unlimited mana of all colors, you may cast cards without paying their mana costs, and you cannot lose the game.