Union Arena: DEMON SLAYER: KIMETSU NO YAIBA Booster Box 16 packsThere are 12 cards pack for Booster Pack products. There are 4 levels of rarities, which are "Common (C)", "Uncommon (U)", "Rare (R)", and "Secret Rare (SR)" while AP cards are included at a low pull rate. There's a total of 106 card types + 6 types of AP cards in the lineup. In addition to this there's also alt art cards! Power up your favorite deck and make playing UNION ARENA even more fun!