夜ふかしの正体 is a Weiß Schwarz card from 甘神さんちの縁結び AMG/W121-039. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
If all players are Level 3 or higher, and you have 5 or more characters with "Yae" in its name, all players send up to 4 cards from the bottom of their clock to Waiting Room. Send this to Memory. 【AUTO】 ALARM (1) If this is on top of your Clock, at the start of your Climax Phase, you may pay cost. If you do, choose 1 of your opponent's Level 1 or higher characters. If you do, your opponent chooses 1 Level X or lower character from their Waiting Room, and swap them. X equals the Level of the character chosen by you -1.
This card was printed in Japanese only; the English text above is an unofficial community translation.