+1: create a 3/3 kavu creature token with trample that's all colors.
−3: choose up to two target creatures. for each of them, put a number of +1/+1 counters on it equal to the number of colors it is.
−6: return target multicolored card from your graveyard to your hand. if that card was all colors, draw a card and create two treasure tokens.
jared carthalion can be your commander.