Tarn, Lord of Deceit

+2: Reveal the top card of your library. If its a white card put it in your hand and gain 2 life. If its a black card discard it and lose 2
0: Pay 5 life: gain control of target permanent an opponent controls.
-7: You get an emblem with: whenever you cast a white or black spell, you may cast a white or black spell from you hand without paying its mana cost.