変わり身 しいたけ is a Weiß Schwarz card from 「ラブライブ！サンシャイン!!」Vol.2 LSS/W53-051. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When you used this card's 『ASSIST』, if you have 《音楽》 or 《動物》 Characters, choose 1 of your Characters in battle, during this turn, it gets ＋1000 Power. 【ACT】 【COUNTER】 ASSIST 2500 Level 2 ［① Place this card from Hand into Waiting Room］ (Choose 1 of your Characters being Front Attacked, during that turn, it gets +2500 Power)
This card was printed in Japanese only; the English text above is an unofficial community translation.