[CONT](Hand):If you have a vanguard with "Machining" in its card name, this card may be discarded as a grade 3 while you are paying the cost for [Stride].
[AUTO]:[Soul-Blast 1] When this card is discarded from hand for the cost of [Stride] of your G unit with "Machining" in its original card name, you may pay the cost. If you do, choose one of your opponent's rear-guards, and that unit cannot [Stand] during your opponent's next stand phase.