The easiest way to up your proxy quality is to make sure you have a high-quality download of the card image
This is also in the colors of exiling counters (Dissipate), exiling targeted removal (Vraska's Contempt), exiling milling (Oona, Queen of the Fae), exiling discards (Mindleech Ghoul), exiling combat damage (Dominator Drone) and exiling graveyards (Nihil Spellbomb)
I even designed a top-down card to represent the Sphere Grid
Turning damage into +1/+1 counters is the real build around here, however, and players are going to love hitting Anti-Venom with 100 damage from Dawnsire to create a truly superlative game-ender
Through the Ages will very likely, and at long last, bring partner pairings into the Arena format thanks to Bruse Tarl, Boorish Herder, reimagined as Final Fantasy XVI's Hugo Kupka (who is not really one of the good guys, as you may guess from the card art), and Tymna the Weaver as Cecil Harvey, illustrated by the legendary Yoshitaka Amano