Union Arena UE20BT That Time I Got Reincarnated as a Slime Booster Box

Release: 6/26/2026

The hit anime That Time I Got Reincarnated as a Slime joins UNION ARENA, arriving as the first Special Booster Pack for the English release. With nearly 200 cards featuring popular characters from Seasons 1 to 3, including Rimuru, Milim, Shizue, Shion, Benimaru, and Shuna, this is a dream item that lets players start building a variety of decks right away.
Features a wide range of North America exclusive foil-stamped autograph cards and newly designed cards. Alongside charming newly illustrated artwork, all *** and ** cards include foil-stamped autographs, offering a truly luxurious finish that collectors will find irresistible. In addition, numerous new designs exclusive to North America are also included.
• 16 packs per display