I would use all 9 GMX cards in the side deck, along with the extra deck bricks, which are Bishbaalkin, Number 33: Chronomaly Machu Mech and Puzzlomino, the Drop-n-Deleter, and put the 12 tech cards from the side deck in the main deck
Original shipping is non-refundable once shipped
Youll be looking either for a commander that cares about hitting your opponent like Anowon, the Ruin Thief, or something that makes it likely that youll get to hit the opponent with multiple creatures like Oona, Queen of the Fae
Others Snake-Eye, Azamina, Fiendsmith, Millennium
x2] [When Attacking] You may trash 1 card from your hand: K type and your opponent has 3 or more Life cards, K type Leader gains [Banish] during this turn