The [PC02BT]Union Arena Booster Pack nomacase contains 20 boxes of collectible cards for the UNION ARINA game. Manufactured by Bandai, the cards are in Japanese language and made of paper. Each booster pack includes cards from the NIKKE set, featuring various characters in standard card size. Designed for ages 6 and up, this product offers players the opportunity to enhance their collection with each booster pack opening.