Fate Wheel Dragon

(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, you may pay the cost. If you do, until end of that battle, your opponent cannot call grade 0 cards from hand to . :[ 1 & 1] When this unit is placed on , you may pay the cost. If you do, choose one of your opponent's grade 1 or less rear-guards, and your opponent puts that unit on the bottom of his or her deck.