Aside from the card handling mechanism, there are some pretty slick details to this build
They start out as a creature with a cool ability, and then flip into a Planeswalker when a specific criterion is met
Banon, the Returners Leader* An interesting addition from the Final Fantasy 6 Commander deck, Banon provides a solid card draw for boros decks that are heavy on creatures and lower to the ground
This can allow you to quickly get more powerful cards to the table, even early in the game
Learn all about his Standard pet project that he played in Chicago: Azorius Oculus: Card choices, hands to keep and sequencing
Legendary Creature Enchantment - Demigod Counters (CTRL to add secondary) Draw Toothy, Imaginary Friend Partner with Pir, Imaginative Rascal (When this creature enters, target player may put Pir into their hand from their library, then shuffle.) Whenever you draw a card, put a +1/+1 counter on Toothy