Stealth Dragon, Hiden Scroll

(This ability is active if you have one or more face up G units in total on your or G zone):[Put this unit on the top of your deck] When this unit is placed on , you may pay the cost. If you do, choose one of your rear-guards not named "Stealth Dragon, Hiden Scroll", search your deck for up to two cards with the same card name as that unit, call them to separate , shuffle your deck, and at the end of that turn, put the units called with this effect on the bottom of your deck in any order.