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You could also word it so that it works only if your monster is currently battling another monster so it doesn't become a potential "burn for 700 for game" card (which Kalut is infamous for)

Simply shuffle it into your standard deck to enjoy casual games with your Pokmon

How to Make a Full Art Pokemon Card Six steps to a finish collectors recognize at a glance, with notes on edge-to-edge illustration, decorative borders, and a premium gallery finish

Attack with Gwenom, and you can loop the Cultists effect endlessly with Mortuary to drain every other player of all their life

That said, even with this increased frequency, foil mythics (typically the most valuable foils in a set) are still incredibly rare, and the odds of getting one in any individual box is quite low