In the Great Ancient Era, the Chaos World had not yet shattered. Heaven and Earth were complete, marking the most prosperous period of the Primordial Era.
At that time, the innate energy flowed between Heaven and Earth, rather than the postnatal energy of today, which is significantly weaker.
The beings of the Primordial Era were mostly born of innate life force, drawing upon the innate energy. As a result, their innate true spirits were untainted by postnatal energy, clearly reflected within their bodies.
However, the creatures of today are different. The ubiquity of postnatal energy means that as soon as a creature in the Three Realms is born, the trace of its innate true spirit becomes tainted by postnatal energy, losing its innate nature, blending into the body, and becoming hard to perceive.
To become an Innate Dao Monarch, one must clearly understand their own innate true spirit and merge it with the Dao Fruit. Only then can a breakthrough be achieved.