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And it certainly leads by example: Vivi Ornitier basically ruined Standard alongside Agatha's Soul Cauldron and earned itself a rightful spot on the banlist

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their decks representing Spellbooks from which they cast powerful Spells, summon ancient Artifacts, and form Contracts with beloved Cryptids to aid them in the Arena

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On the other hand, the competitive scene features something called rotations that are designed to standardize a fixed number of legal cards at any given point

It's worth mentioning that while this strategy is effective, it can also be irritating to play against and is only recommended for more competitive formats.