Generation Break 1 (This ability is active if you have one or more face up G units in total on your or G zone):[Retire this unit] At the beginning of the guard step of the battle that your vanguard was attacked, if the number of your other rear-guards is three or more, you may pay the cost. If you do, look at three cards from the top of your deck, search for up to one card from among them, call it to as , and shuffle your deck.