優等生にして頑固者 幸 is a Weiß Schwarz card from グリザイアの果実 Vol.2 GRI/S84-109. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 At the beginning of your climax phase, choose 1 of the following abilities, and this card gets that ability until the end of your opponent's next turn. "【AUTO】 When this card attacks, if the character facing this card is level 3 or higher, this card gets +6000 power until end of turn." "【AUTO】 When this card becomes 【REVERSE】, if the level of this card's battle opponent is higher than your opponent's level, you may put that character at the bottom of your opponent's deck."