Legendary Dimensional Robo, Daikaiser Leon

-Stride Step-[Choose one or more cards with the sum of their grades being 3 or greater from your hand, and discard them] this card on your from face down. :[ 1 & Choose a face down card named "Legendary Dimensional Robo, Daikaiser Leon" from your G zone, and turn it face up] If you have a heart card with "Kaiser" in its card name, until end of turn, this unit gets ":When your drive check reveals a grade 3 card, choose up to one of your opponent's guardians, retire it, and that unit's effects with "cannot be hit" are nullified.".