Union Arena TCG: Black Clover Booster Box [UA20BT] - 16 PacksExpand Your Collection with the Union Arena TCG: Black Clover Booster Box 16 Packs! Immerse yourself in the magical universe of Black Clover with the Union Arena Booster Box! Featuring 16 packs and a variety of rarities, this set offers stunning card designs and a chance to collect your favorite characters from the series. Each pack contains 12 cards, giving you ample opportunity to build powerful decks and discover rare treasures. With 35 Commons, 34