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Here, you can think more along the lines of Blightsteel Colossus, Meteor Golem, or a Triplicate Titan

For a concrete example, let's compare two real cards from the Sword & Shield era: the Umbreon VMAX Alt Art from Evolving Skies and the Pikachu VMAX Rainbow Rare from Vivid Voltage

Suitable for Pokemon card collectors, players, and trading card hobby enthusiasts, the Pokemon TCG Guardians Rising and Steam Siege 2 Pack Blister supports collecting, gameplay preparation, and trading card organization activities

I dont think Days Undoing is actually busted or anything, but I think its actually going to see play (often out of sideboards, such as the Blue Devotion deck above)

Dont be fooled by petty parlor tricks

Inteleon V #180 Pokemon Rebel Clash Keep track of your collection value over time