[AUTO](VC):[Counter Blast (1)-card with "Star-vader" in its card name] When this unit is placed on (VC), or when your G unit with "Star-vader" in its original card name Stride, you may pay the cost. If you do, your opponent chooses one of his or her rear-guards, and locks it. [AUTO](VC):When your opponent's locked card is unlocked, if no unit was retired with this unit's effect this turn, you may retire one of those unlocked units. If you do, draw a card.