It was as if a fierce wind had blown in. The book's pages rustled and flipped, while the curtains in the study swayed without pause.
At the same time, clamor rose all around him, as though countless people were speaking at once, or someone was screaming at the top of their lungs.
Yet these abnormalities lasted only an instant before abruptly vanishing, as if forcibly suppressed by some power.
Chen Chuan fixed his gaze on the book and reached out to smooth its pages. He could tell that what had just occurred had been purely a mental phenomenon. The moment it appeared, his Second Self had borne it all away, and the abnormalities naturally disappeared with it.
Through that brief contact, he roughly understood what it was.
These should have been spiritual impressions containing cultivation experiences, left behind by people who had previously read this book—or rather, this section of it.
It was like the appendices and annotations left behind by predecessors, except they had not been recorded in writing.
However, the mental states of these people seemed quite different from those of ordinary Fighters. Chen Chuan guessed that they had either gone astray in their cultivation or been contaminated by something. That was why the sensations were so chaotic and complex. Some of the content might not even have been something a human could produce. It felt somewhat like those existences from the other side.
Even so, that brief glimpse had made him feel that these things were extremely valuable.
They contained the personal experiences of those predecessors when they cultivated Profound Cave Observation. So-called "Profound Cave" meant penetrating the mysteries. Whether it was the Purity Faction's manuals or Wan Song's cultivation method, they only pointed out the direction and did not explain the precise path forward. Seeing even