Steam Knight, Ubara-tutu

(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. : 2 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 your opponent puts that unit on the bottom of his or her deck.