Inspect the edges of your card to see if any of the custom card front hangs over the side

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These include things like the Strixhaven Mystical Archive cards, the Amonkhet Invocation cards, and special Secret Lair cards
Most promo cards were useless, but for the ones that took off, it messed things up big time
Attack 2: [YYY] Shining Wind (100) During your opponent's next turn, this Pokmon has no Weakness