Unofficial fan content — facts below are pulled from Bandai's official Union Arena product pages as of late September 2026.
Union Arena had its busiest single day of the fall on September 18, 2026, when Bandai put two long-awaited English-language boosters on shelves at once: Re:ZERO -Starting Life in Another World- [UE24BT] and Attack on Titan Vol. 2 [UEX07BT]. Since the EN line launched back in September 2024, this marks one of the few times two full boosters from different anime properties have landed on the same day — and both sets are tournament-legal out of the gate.
Re:ZERO UE24BT — the wedding-dress showpiece
The Re:ZERO booster is the set collectors have been circling since word of the specially commissioned illustrations of Emilia and Rem in original wedding-dress designs first surfaced. Confirmed on the official product page, the set's selling points include foil-stamped autograph cards of the TV anime voice cast, serial-numbered, hand-signed Action Point cards, and a box-topper program where each box carries 1 of 9 designs (6 foil and 3 gold foil).
- Release date: September 18, 2026 · MSRP $4.99 · 12 cards per pack, 16 packs per box
- Rarity spread: 35 Common, 35 Uncommon, 18 Rare, 12 Super Rare, and 6 Action Point types
- Ships alongside a companion Starter Deck [UE24ST] built around the yellow energy color with Emilia at its core, per reveal coverage
Early competitive talk leans on decks built around BLUE Subaru & Rem and YELLOW Rem & Ram, though the meta is young as of publication — treat anything beyond "these cards are popular" as unfolding.
Attack on Titan Vol. 2 UEX07BT — the Nine Titans join a new color
Vol. 2 pulls from The Final Season, bringing in Eren, Zeke, and the Nine Titans alongside fan favorites like Mikasa, Armin, and Levi — reportedly debuting in a new Yellow energy color. It mirrors Re:ZERO's premium treatment: voice-cast autograph cards, newly drawn illustrations exclusive to the product, serial-numbered hand-signed Action Point cards, and box toppers at 1 of 8 designs (5 foil, 3 silver foil).
- Release date: September 18, 2026 · MSRP $4.99 · 12 cards per pack, 16 packs per box
- Rarity spread: 28 Common, 25 Uncommon, 12 Rare, 8 Super Rare, and 6 Action Point types
The original Attack on Titan booster (UE10BT) was well-liked but never a meta-defining set in the English scene; Vol. 2's bigger lineup and exclusive art give it a stronger shot at real play rather than just shelf appeal.
Why this matters
Set for set, Union Arena remains the busiest of Bandai's four card games this year, and back-to-back drops like this are worth watching if you swing between collecting and competing. Both sets are out now at the usual $4.99 booster price, so if Re:ZERO's wedding-dress Emilia or the Nine Titans catch your eye, this is one double day you don't need to wait out.