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Its a wonderfully flavorful take on a notoriously oppressive creature, literally allowing you to trap a creature within the Gelatinous Cube where it can eventually be devoured unless the Cube can be dealt with first

It wasn't high income

This Pokmon makes its home in the Paldea region, first appearing in the mainline games 'Pokmon Scarlet and Violet'

Then, Mirror Golem has the additional ability that it has protection from each of the imprinted card's card types (funnily enough, Mirror Golem was printed before a few card types were introduced, so the reminder text fails to mention planeswalkers, battles, and kindred spells)

Abilities, two of them: Flying and Regeneration