Each battle is a menu of boxes. Take as many battle slots as you like from any of them, or grab a full box and skip the battle. Add your name and Discord username, and you're in. Want to face someone specific? Tick their name when you sign up. Payment is arranged with adishguy on Discord.
Slots update live
How box battles work
Half a box each. Every box is split between two combatants, and each opens half.
Biggest hit wins. The winner is whoever pulls the single highest dollar value card, using TCGlow pricing (verified seller).
Gold pack boxes. In boxes with a gold pack (currently Compendium of Rathe and High Seas), each combatant keeps their own packs and the winner claims the gold pack.