Unfortunately, with the invasion of the Chaos Demigod, Jiang Chen's plans were completely disrupted, forcing him to incorporate the Immortal World into his domain ahead of schedule.
In doing so, although he obtained the Immortal World, he thereby lost the opportunity to purge certain Great Divine Transcendents.
Jiang Chen's cleansing of some Great Divine Transcendents in the Immortal World was not just to eliminate hidden dangers for the Human Race, but also for the Prehistoric World.
The truth is, there were too many Great Divine Transcendents in the Prehistoric World, and after the reshaping of Heaven and Earth, while the stature might have been elevated, the Original Source would inevitably be diminished.
It was like a person recovering from a severe illness, who needs to convalesce for a long time to fully recover. Of course, if one could find sufficiently precious supplements, the recovery time could be greatly shortened.