It was not the evolution of life, but the manifestation of the Dao.
Unfortunately, by the time he became an Immortal Emperor, Li Zhi had already disappeared.
Desolate Heaven Emperor had originally thought that Li Zhi had abandoned the Method of Five Immortals Becoming Emperor, but he had never expected that Li Zhi would perfect it to its current level.
The nine figures came from nine different evolutionary systems and also represented nine different Immortal Daos. Together, they constructed an entirely new model of the Great Dao, greatly expanding the scope encompassed by the Immortal Dao.
Although no one knew why Li Zhi had not unified those nine evolutionary systems when he broke through the True Self Domain.
By all rights, the Sacrifice Dao Domain should already have been the limit of all evolutionary systems in the All Heavens and Myriad Worlds. It should have been impossible to preserve independent evolutionary-system Dao Fruits beyond that point.
Back then, Chu Feng had possessed Dao Fruits from two evolutionary paths, but when he broke through Above Sacrifice Dao, those two Dao Fruits had completely merged, never again distinguishable from each other.
Yet Li Zhi had clearly preserved the Dao Fruits of different Immortal Dao evolutionary systems, and the battle prowess they displayed was extraordinary.
They could actually contend with Ye Fan's Forbidden Secret Technique, which he wielded through nine Imperial Weapons and the Nine Secrets.
On the battlefield, the fight was exceptionally fierce.
Li Zhi and Ye Fan's true bodies were confronting each other, while the real battle was left to their incarnations and weapons.
At their level, they were no longer bound by form. Weapons and physical bodies made no difference. Both were the Dao.
Li Zhi's Celestial Maiden Incarnation was extraordinarily powerful, seeming like the manifestation of the Heavenly Dao.