Wings of Phenomenon, Wingmatter

(This ability is active if you have one or more face up G units in total on your or G zone)::When this unit attacks a vanguard, this unit gets +6000 until end of that battle. :[ 1 & Choose one of your rear-guards, and lock it] When this unit is placed on , you may pay the cost. If you do, choose one of your opponent's grade 2 or less rear-guards, and lock it. (The locked card is turned face down, and cannot do anything. It turns face up at end of the owner's turn.)