Almighty Shenron

+1: Create a 3/3 Namekian creature token with reach that's all colors. Almighty Shenron can be your commander.
-4: 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 that it is.
-7: Return up to 3 target multicolored cards from your graveyard to your hand. For each card you don't take, create a Treasure token.