pokemon ultra rare trainer cards Gym 191/195- Silver Tempest - Full Art - Card Ability Hurried Gait Once during your turn Pokemon Ultra Rares & Secret

(2: Target creature gets +X/-X until end of turn, where X is the number of artifacts you control.) It can help you destroy a specific creature or boost one of yours, but you have no control on what X is unless you keep artifacts in your hand that you can play to get the correct X you need

The set name appears to be a reference to Mewtwo, the Genetic Pokemon

Not that it's not a fantastic illustration - Atsuko Nishida can be considered one of the best illustrators in the franchise (and is responsible for the creation of a little Pokemon called Pikachu)

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However, once it hits the field, it makes all of the life you gain during your turn into a massive threat