Union Arena TCG: ATTACK ON TITAN BOOSTER BOXUNION ARENA "Attack on Titan" Each Box Contains 16 Packs Includes cards that can strengthen decks of existing colors, allowing you to recreate new scenes from the TV anime! Level up the fun of UNION ARENA! Each Booster Pack contains 12 cards. There are 4 rarity levels: Common (C), Uncommon (U), Rare (R), and Super Rare (SR), with AP cards included at a low pull rate. The lineup features a total of 73 card types plus 5 types of AP cards. Additionally,