The issue lies within the Original Ancestral Qi in the body.
That strand of Original Ancestral Qi requires an extremely high amount of Immortal Dao Origin Law.
At this moment, Zhang Jian's Innate Primordial Spirit has fully fused the Sea of Consciousness of his Primordial Spirit with the Immortal Dao Origin Law. Though a sliver of Immortal Light of Undying Origin has been born, Zhang Jian still feels unable to achieve a qualitative transformation after it merges into his Innate Primordial Spirit.
The reason is the quantity is too small to thoroughly integrate with the Ancestral Qi.
This unforeseen change leaves Zhang Jian somewhat helpless.
He knows that he may need to wait until after passing the Celestial Immortal Tribulation, possibly relying solely on the Creation Immortal Light born from the final tribulation to complete the ultimate transformation.
The reason lies in his extremely high nature as an Innate God.
The essence of that Original Ancestral Qi is too High Tier.
