Since the effect of "Brook" directly trashes your opponent's Character rather than K.O.'ing it, it will not trigger your opponent's [On K.O.] effects
You will notice that your opponents upgrade their decks from time to time too and there are many hard opponents out there
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mthursty January 29, 2025, 4:41am 9 The conclusive comment KoinKing January 29, 2025, 4:41am 10 Without knowing anything about signatures, I respectfully disagree that having only one Pokemon card makes it seem more legit, that would be an instant red flag for me If its a high value item, I would only ever buy from a Japanese seller if they have good reviews from non-proxy services and the backgrounds of their other listings match
You can use Intrigue Shield in order to farm for Red Dragon Archfiend mat without having your hawk destroyed by not attacking, in addition you could also instead duel LV 10 Bastion for the same reason as Desmanian
However, this card finds itself to be expensive, not just due to its Star status, but because the Celebi portrayed is the shiny red variant.