Although Ye Fan was discomforted by the Tiger and Leopard Thunder Sound emanating from Zhuo Junwu's body, he showed no intention of retreating. Instead, his eyes narrowed determinedly as he mustered his focus to observe Zhuo Junwu closely.
Zhuo Junwu's stance appeared normal, similar to any ordinary standing posture, but upon closer inspection, Ye Fan observed that beneath his master's skin and muscles, his bones were trembling slightly. The sounds of the vibrating joints joined into a subtle chorus before finally merging into the deep, rumble-like reverberation of thunder.
After a while, Zhuo Junwu ceased the thunderous sound, and said, "This is the Tiger and Leopard Thunder Sound. It uses sound vibrations to hammer and fortify every bone in the body, making the bone density solid, cultivating the marrow to be as heavy as lead and mercury."
Ye Fan nodded, taking the lesson to heart.
