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I took one last ditch effort to search and accidentally broke the seal at the back of the pack at the seam, which left me no choice but to open it," he told PC Gamer

1 Lathril, Blade of the Elves

Given that both of the cards feature an insta-win mechanic, the reason for the bans is fairly obvious, but how exactly this issue wasn't flagged before the cards went into circulation is perhaps as mysterious as the Unown species itself

Because of Volcanions ability Flare Starter, if a player goes second on their first turn, they can search their deck for three Fire energies, use them any way they want, and then shuffle their deck