Chapter 252: Chapter 154: The Division of Spiritual Force - The Success Rate of Advancement Provided by a Third Rank Peak Sandworm

In response to the question posed by his son, Song Shan didn't need to ponder much and explained:

"Originally, this matter wasn't of much relevance to you. Following the regular cultivation of the Spectral Energy Guidance Technique suffices."

Listening, Song Chi always felt that his great-uncle's gaze lingered on him for a moment, but it soon shifted away, as if it was just his imagination.

"Within the Torch Human Civilization, the Torch Human Clan classifies spiritual force strictly according to the cultivation level of one's own Spectral Energy Guidance Technique, that is, the number of times their life has undergone sublimation."