Corrupt Maya Slipstream

+2: Exile the top card of your library. You may play it. It costs 2 mana less to cast if it is a spell. If not, it cost 1 mana less to cast.
-2: Exile the top two cards of your library. Until the end of your next end step, you may play these cards and their mana color does not matter.
-7: You get an emblem with: "At your draw step, exile the top card of your library. You may play exiled cards and their mana color does not matter."