Inside the eighteenth floor of the Underworld.
Yu Ming had already informed A Qin, The Barber, and Tong Wu about Zhang Chen's desire to wait several years.
Zhang Chen first found a quiet cell, where he sat cross-legged in meditation and contemplation for an entire year.
As for the strengthening of his physical body, the upper volume of the Body Devouring Heart Sutra had remodeled and reshaped his flesh, essentially bringing every part of his body to its utmost limit. There seemed to be no room left for improvement.
This level of physical strength was also the fundamental reason Zhang Chen had reached the Apostle level.
The first three chapters of the upper volume—Devour Flesh, Devour Bone, and Devour Brain—were all concerned with transforming the body, corresponding respectively to strength, toughness, and neural reactions.
The fourth chapter, "Devour Heart," connected and fused the contents of the first three chapters. Therefore, if Zhang Chen wanted to make a breakthrough on the physical level, he had to forge a Unique Path—either find flaws that should not exist in the utterly perfect Body Devouring Heart Sutra, or try to train his body through other means.
Thus, Zhang Chen spent a full year thinking it over and ultimately came up with a feasible plan.
The Body Devouring Heart Sutra was such a perfect cultivation art that, when used by ordinary Devourer Realm creatures, it possessed no flaws whatsoever. Yet for a special creature like Zhang Chen, neither human nor ghost, there might still be something that could be supplemented.
The Body Devouring Heart Sutra could bring a Devouring Ghost's potential to its absolute peak, yet it did not allow the ghostly portion within Zhang Chen's body to unleash all of its latent power.
With that idea in mind, Zhang Chen began seeking ways to