水着のアイン is a Weiß Schwarz card from 2009年度トライアルデッキ【W】 PT/W07-T05. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When the character battling another of your characters becomes REVERSE, during this turn, this card gets +1000 Power. 【AUTO】 ENCORE [Discard 1 Character to Waiting Room from hand] (When this card is placed in Waiting Room from Stage, you may pay the cost. If you do, return this card in REST to its previous slot.)
This card was printed in Japanese only; the English text above is an unofficial community translation.