Joruri-P.U.N.K. Madame Spider (BLMM-EN072) [Battles of Legend: Monster Mayhem]

You can pay 600 LP; add 1 "P.U.N.K." Trap from your Deck to your hand. When you activate a "P.U.N.K." card or effect that targets a card your opponent controls (except during the Damage Step) (Quick Effect): You can target 1 face-up monster your opponent controls; its ATK becomes halved until the end of this turn. You can only use each effect of "Joruri-P.U.N.K. Madame Spider" once per turn.