Union Arena is a "Common Rules Trading Card Game" that allows you to play a card game using each of your favorite characters, and you only need to learn one set of rules! Each of the starter decks is essential to start your UNION ARENA experience! Learn to play your favorite deck, recreate the scene, and play against another title! Demon Slayer: Kimetsu no Yaiba joins UNION ARENA! This addition includes the Entertainment District Arc and more!