For the past thousands of years, Man Shan and his wives had been borrowing power from the Star Tempering Purple Zoysia. Although they did not consume it using the right way, they had nearly reached the stage of completely transforming into true demons. Moreover, with the magical effect of the Sixth Revolution Pills, Manifestation Tempering Pills which were given by Ning Fan, they entered into seclusion at once to complete their demon transformation right after they consumed the pills!
The effect of the Manifestation Tempering Pill was to temper one's manifestation and demon avatar. It was something that was widely sought after especially by Void Refinement Realm experts.
To star spirits, however, evolving into a true demon was no different from attaining one's own demon avatar on the foundation of their star spirit bodies. Hence, the Manifestation Tempering Pills undoubtedly had amazing effects for them.