Sea of Nihility.
Chu Yuan was discussing the arrangements for the new era with his many disciples here.
After a period of discussion, the arrangements for the new era were quickly settled.
The new era adopted five realms: Qi Cultivation, Foundation Establishment, Golden Core, Nascent Soul, and Divinity Transformation.
At the same time, the concept of Spirit Root was employed. Only a very small portion of all living beings possess Spirit Roots. The most common is the Five Elements Spirit Root. The fewer types of Spirit Roots one has, the better their aptitude. Naturally, a single Spirit Root is the strongest. Of course, there are even more extraordinary talents above this, such as the Heavenly Spiritual Root.
Those who possess Spirit Roots are extremely rare.
The arrangement of Spirit Roots was intentionally done by Chu Yuan.
He certainly knew that it would be best if all beings in the Immortal Realm could be strong and everyone could cultivate.