Following the arrival of the soul fighter aircrafts on both flanks, Zhang Huanyun immediately dispatched the order for the soul fighter aircrafts and the Blood God Army's mechas to escort the infrasonic aircraft to slowly retreat. At the same time, a high frequency infrasonic wave was unleashed at the abyssal Devil Puppets on the opposite side.
Even though it would be extremely difficult to kill the powerful abyssal Devil Puppets using the infrasonic wave, it would still weaken these abyssal creatures to some extent.
