union arena sword art online booster box Amazon.com: BANDAI Pack, [UA15BT] (Box), 16 Packs : Toys & Games UNION ARENA showcases exclusive cards featuring newly drawn artwork created specifically for this set Union Arena TCG: Sword Art

Thunder Dragon will have a spare Soldier of Chaos, Orcust a Zeroboros, and the threat of Equimax is constant in Infernoid

Here are the best cards to look out for in the deck

Latias (Promo-A 101 / P-A) card How to get: Was obtained simply by logging in to TCG Pocket and accessing the missions under the September 2025 Premium section as long as you had the Premium Pass

There's the Field Notes cards (first introduced in Bloomburrow ), along with Power Poses inspired by the show's opening theme

This Cultist was hiding on the backside of the Agenda 1 card and immediately started hunting the Investigator with the most Clues

Other monsters you control cannot attack during the turn you activate this card