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SE Secret Rare Summon Gate X TRAP Continuous Each player can Special Summon a maximum of 3 monsters from the Extra Deck each turn

I'm not sure if we ever actually got a gimmick like this in future sets, but B.F.M

Dark Rebellion Xyz Dragon [Alternate Art] QCAC-JP036 YuGiOh Japanese Quarter Century Art Collection Keep track of your collection value over time

Banlist History Restriction changes recorded for Symphonic Warrior Synthess

Various programs (for various reasons) have been known to pop up dialogs informing you that a reboot is required, with the only button labelled "OK" (and resulting in an immediate reboot)