SIDE：Y is a Union Arena card from THE IDOLM@STER SHINY COLORS Vol.2 EX03BT/IMS-2-055. Compare listings from Singapore Union Arena sellers on CardJio, then jio them on WhatsApp.
Choose 1 Character card on your opponent's Front Line and it gets -1000 BP for the turn for each [Trait: L'Antica] card on your field.
选择对方前线中的1张角色，我方场上存在的[特征:L'Antica]每有1张，本回合中，BP-1000。