After suppressing his injuries with his internal energy, Zheng Jia Ru lifted his head in confusion: "How did you silently shatter my internal energy defenses and injure me?"
"Infrasound weapon!" Pei Yan said, shaking his arms: "I can now emit infrasound waves undetectable by the human ear." Speaking of this, Pei Yan paused and pointed to his mechanical left eye before explaining further: "In the previous battle, I was constantly using my left eye to analyze the resonance frequency of your energy barrier. Only at the very last moment did I obtain the precise data, which allowed me to silently shatter your barrier and injure your body."
"A truly powerful ability! It's really an unbeatable defense!" Zheng Jia Ru said, as he staggered up, wiping the blood from the corner of his mouth, "Is that all you have?"
