Aang, Last Airbender

+1: Aang deals 2 damage to target creature, player, or planeswalker. You gain 1 life.
-2: Create a white 4/4 Flying Bison creature token with Flying.
-7: Exile target permanent. Aang becomes a gold 6/6 legendary Avatar with Flying, Reach, Hexproof, Haste, and "If this creature would die, exile it.