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Attend Events and Tournaments: Events and tournaments provide opportunities to trade cards with other players

This is not science fiction

[Counter] Up to 1 of your Characters or [Silvers Rayleigh] gains +2000 power during this battle

That means that the booster packs within will be all Sword & Shield -era sets

While all the other colors would be underrepresented in that particular set, that wouldnt be too bad for constructed formats, and if handled carefully (and adjusting the ratios over time to eventually reach an equilibrium) this strategy could work for constructed

When a card like Welcoming Vampire is involved, you usually need to stretch into a second color for interaction