Players can simply insert Mew ex into their decks and deploy it if coming up against a Mewtwo ex, removing its previously straightforward means of victory and, at the very least, allowing for a more dynamic match
Unfortunately, Quandrix fielded a snake-fractal, in violation of the No Snakes rule
Some good ones I found on a cursory search are Crash Through if you really need Balduvian's draw, or Brute Strength, Built to Smash, Invigorated Rampage, Ride Down, Run Amok, Rush of Adrenaline and Temur Battle Rage are all fairly inexpensive (both in terms of CMC and market price on the cards) spells that will give your creatures a boost, destroy blocking creatures (with regard to Ride Down), and give trample
Each of the six card colors has its own defining characteristics that inform how decks are to be built and what tactics those decks are to use