Glimmer Breath Dragon

(This ability is active if you have one or more face up G units in total on your or G zone):[ 1 & 1] When this unit is placed on , if you have a grade 3 or greater vanguard with "Chronojet"in its card name, you may pay the cost. If you do, choose one of your opponent's grade 2 or less rear-guards, your opponent puts that unit on the bottom of his or her deck, and this unit gets +2000 until end of turn.