Innate law should take people as far as the peak of the Grand Emperor World. So, to become an Empyrean, a cultivator will have to cultivate Primordial Law that governs the Chaos of the entire universe.
As the name implies, Primordial Laws have existed since the beginning of time, since before the births of Normal and Source Chaos Worlds. By wielding it, cultivators will no longer be limited by their Chaos Worlds and can roam Primordial Chaos, contacting and iterating with primordial species like Fiendgods.
Finally, to become Paragons, cultivators will have to understand the Grand Dao Source–the origin or source of all laws in the Chaos Universe.
By then, they would become beings standing at the peak of Primordial Chaos, beings capable of treating the River of Time as nothing but an ordinary river, traversing up and down its stream.
'However, with the Heaven Will, cultivators can go from regular laws–even no law–to Grand Dao Source. Furthermore, since even Great Emperors can wield the source of the Dao, the other laws have to be boosted to balance things out.'
It created Fiendgods, boosting their Primordial Law and Innate Demon God's Innate Laws. Then, secretly manipulate the confrontation between the three Paths.
'Through constant battles, Fiendgods, Paragons, and Heavenly Primarchs can increase their battle strength while also retraining each other.'
chap 783
'Innate Lifeforms follow the Heavenly Dao Path. Heavenly Dao boosted their Innate Laws; this is the reason many of them were on par with Great Emperors. However, as soon as an Innate Lifeform enters Primordial Chaos, they lose that boost.
'The same goes for Fiendgods. They follow the Primordial Dao Path, and their Primordial Laws are boosted by Primordial Chaos itself. If they leave, their laws are also weakened.
'Great Emperors follow the Grand Dao Path, comprehending the Source and not being affected by the environment."