“What else did Grandpa tell you?”

Thea tilted her head in an effort to remember and suddenly recalled a fact. “Grandpa said the technique recorded in the Medical Book Volume Two is called Invincible Body Siddhi. Mastering it will make you invulnerable to swords and bullets. However, it needs to be practiced alongside the Medical Book First Volume which will act as a guide.”

“Back then, Julianna wasn’t able to pierce through your skin with a knife in Dagon Fountain Villa. You claimed to be wearing clothes made from a special material, but now it's clear to me that you've changed your body's cellular structure with medicine.”

Thea felt the shame creep up on her as she recalled past events.

After reading the second volume of the medical book, James realized what it was trying to describe was a set of defensive martial arts.

However, he had yet to understand how to practice it.

His grandfather was a martial arts genius and was highly proficient in the field of medicine too. Since Tho