Happy Summer ルビー is a Weiß Schwarz card from 【推しの子】Vol.3 OSK/S133-030. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 {CX Combo} MEMORY - When this attacks, if you have the Door CX (058) in your CX Area, and you have 4 or more Memory, flip all of your face-up cards in Memory face-down, and this turn. this gets +2000 power, then choose 1 of the following 3 effects and resolve it, a) "Choose up to 3 characters in your Waiting Room, add them to hand." b) "Deal 4 damage to your opponent." c) "[Discard 1 《Show Business》 character] You may pay cost. If you do, deal 2 damage to your opponent, then heal up to 1."
This card was printed in Japanese only; the English text above is an unofficial community translation.