オンステージ！ フェルト is a Weiß Schwarz card from 「Re:ゼロから始める異世界生活」Vol.4 RZ/S132-004. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【CONT】 During your turn, if you have 3 or more other characters, this gets +4000 power. 【AUTO】 {CX Combo} RESONATE [Reveal 1 {copy of this} from your hand, Send the Choice CX (040) from your CX Area to Waiting Room] At the end of this card's attack, if you are level 2 or higher, and you have 2 or more other characters, you may pay cost. If you do, choose up to 3 Yellow characters in your Waiting Room, add them to hand.
This card was printed in Japanese only; the English text above is an unofficial community translation.