道具であることアイン is a Weiß Schwarz card from Phantom -requiem for the phantom- PT/W07-086. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When 「終幕」 is placed in your climax slot, during this turn, this card gets +1000 Power and gains the following ability.「【AUTO】 When the character battling this card becomes REVERSE, you may place that card at the bottom of your opponent's deck.」
This card was printed in Japanese only; the English text above is an unofficial community translation.