一つ屋根の下 美琴＆黒子 is a Weiß Schwarz card from 禁書目録II＆超電磁砲 RG/W13-052. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 When this card is placed on Stage from Hand or through 『CHANGE』, you may place the top card of your Clock into Waiting Room. 【AUTO】 ［① Place 1 card into Waiting Room from Hand］When this card attacks, you may pay this cost. If you do, during this turn, this card gets +2000 Power and gains the following ability.「【AUTO】 When the Character battling this card becomes REVERSE, you may deal 1 Damage to your opponent.」(Damage can be cancelled)
This card was printed in Japanese only; the English text above is an unofficial community translation.