Strict Instructor, Lambda is a Weiß Schwarz card from Booster Pack The Eminence in Shadow EIS/SX07-064. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 [(1) Put 2 cards from your hand into your waiting room] When this card is placed on the stage from your hand, you may pay the cost. If you do, choose up to 3 level 0 or lower 《Eminence in Shadow》 characters in your waiting room, and put them in separate positions of your stage. 【AUTO】 When this card attacks, choose 1 of your other 《Eminence in Shadow》 characters, and that character gets +X power until end of turn. X is equal to the number of other 《Eminence in Shadow》 characters you have ×500.