at the beginning of your end step, put a loyalty counter on another target planeswalker you control.
+1: create a 1/1 red wizard creature token with "t: add r. spend this mana only to cast a planeswalker spell."
−3: you draw x cards and commodore guff deals x damage to each opponent, where x is the number of planeswalkers you control.
commodore guff can be your commander.