Xie Qing had spent years in the illusion, and during that time, the lightning had never stopped striking him. Although it was excruciating, he gradually grew accustomed to the pain.
Eventually, he even thought of using the lightning to temper his soul.
"Soul Integration..." Xie Qing furrowed his brow, recalling what he had been taught: "A Nascent Soul cultivates the soul and expands it in size. However, eventually, it becomes so large that the cultivator's body cannot contain it..."
This was where Soul Integration was necessary. Cleansing and merging with the body. Although it sounded simple, like adding 2 + 2, in reality, it was extremely difficult.
Cleansing the soul? This required extremely rare resources and effort. If the cultivation technique was not good enough, then even with resources, it would all be for naught!