Aang, Avatar Ascendant

+2: Reveal the top four cards of your library. Gain 1 life for each color among them. Put one to your hand, the rest to the bottom of your library.
-4: Sacrifice another permanent you control and choose three other target permanents. Destroy one, exile one and return one to its owner's hand.
-8: You gain an emblem with: "Cards in your hand with one or more colors have an alternate casting cost of one mana of each of that card's colors."