After advancing to the Mahayana Period, his Magic Power had reached perfection, with nowhere further to go.
Fang Xi's seclusion was mainly to research the Taisui and Great Liang's Demon and other such Taoist Fruit Artifacts.
Early on, he had foresightedly brought out a batch of 'Demon' and other Taoist Fruit Artifacts from the Da Liang World, handing them over to The Nine States for research.
However, the other party had always failed to produce any results.
This was all because the rank of the Taoist Fruits was too high!
Only when Fang Xi was about to touch the True Immortal level did he gradually gain some understanding of his own.
These understandings were still mainly from the cultivation aspect.
The Nascent Soul, which started transforming into the Origin Soul, drew from the essence of the Ancestral Demon Tree, gradually touching upon the power of Taoist Fruits.
And the gains... were very substantial.