“I want to be the power behind the scenes!” The Eminence in Shadow joins Union Arena with a Japanese Edition booster set packed with characters and scenes from Season 1 and Season 2 of the anime. Featuring Shadow, the Seven Shadows, and other key characters from the series, this release is built for both Union Arena players and collectors looking for premium The Eminence in Shadow cards.
Collectors can chase foil-stamped autograph cards featuring members of the anime’s voice cast, including Shadow, Alpha, Beta, Gamma, Delta, Epsilon, Zeta, Eta, Alexia, Claire, and Rose. The set also features a large lineup of brand-new original illustrations created specifically by illustrators for this release, including Shadow, Alpha, Beta, Gamma, Delta, Epsilon, Zeta, Eta, Alexia, Claire, Rose, Aurora, and Beatrix.
A major chase in this release is the Limited Edition Serial Numbered AP Card Campaign. Select booster packs may contain limited Action Point cards with serial numbers at a very low pull rate and in limited quantities. These special AP cards are planned to feature cast autographs, giving collectors an ultra-premium chase to look for in The Eminence in Shadow [UA52BT].
Each booster box contains 16 packs, with 8 cards per pack, and the set includes Super Rare, Rare, Uncommon, Common, and Action Point cards. Whether you are building a Union Arena deck, collecting Japanese-edition sealed product, or chasing foil-stamped autograph cards and serial-numbered AP cards, UA52BT is a standout release for fans of Shadow Garden.
Product Details
- Product: Union Arena Booster Pack The Eminence in Shadow [UA52BT]
- Edition: Japanese
- Release Date: May 22, 2026
- Cards per Pack: 8
- Packs per Box: 16
- Boxes per Case: 16
Card Types
- SR: 10 types
- R: 12 types
- U: 28 types
- C: 30 types
- AP: 14 types
Featured Autograph Card Lineup
- Shadow: Seiichiro Yamashita
- Alpha: Asami Seto
- Beta: Inori Minase
- Gamma: Suzuko Mimori
- Delta: Fairouz Ai
- Epsilon: Hisako Kanemoto
- Zeta: Ayaka Asai
- Eta: Reina Kondo
- Alexia: Kana Hanazawa
- Claire: Rina Hidaka
- Rose: Haruka Shiraishi
Why Buy This Box?
The Japanese Edition Union Arena: The Eminence in Shadow [UA52BT] booster box is a strong choice for collectors and players looking for a premium Union Arena release centered on one of anime’s most popular dark fantasy series. With content from both anime seasons, new original illustrations, foil-stamped autograph cards, and limited serial-numbered AP cards, this set delivers strong sealed-product appeal and exciting chase potential in every box.