Condition is absolutely everything
Like most Magic: The Gathering cards, the value of Big Score depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Secrets of Strixhaven Mystical Archive)
This eventually grows Rielle into a big threat that can be your win condition, and you can play cards like Crackling Drake to complement this strategy
Power Packs will allow collectors to purchase digital packs that contain a PSA-graded trading card
Your opponent may activate the Counter effect of a Character or Event from their hand to add the amount of power listed on the card
Aclazotz, Deepest Betrayal Momo, Friendly Flier Momo, Playful Pet Momo, Rambunctious Rascal Wingnut, Bat on the Belfry Zoraline, Cosmos Caller