Stealth Dragon, Runestar

(This ability is active if you have one or more face up G units in total on your or G zone): 1 When this unit attacks a vanguard, if this unit is boosted ([Boost]), you may pay the cost. If you do, search your deck for up to one "Stealth Dragon, Runestar", call it to , shuffle your deck, at the end of that turn, return the unit called with this effect to your hand.