While the Martial Dao Prime Body was in seclusion in Avici, he did not stop deducing the Dharmic formulation of the Martial Dao. When he was about to come out of seclusion, he had already comprehended the key points and was only missing some details and opportunities.
In other words, it was unrealistic for the Martial Dao Prime Body to advance to the next realm of the Martial Dao within a short period of time.
However, at the same time, because he had smelted and browsed through too many ancient books and sutras, another thought flashed through the mind of the Martial Dao Prime Body.
Perhaps before he entered the next realm of the Martial Dao, he could make use of another method to condense his Grotto-heaven first and become a Fiend King!
The appearance of the Martial Dao Prime Body was a variable that was beyond the Three Realms and Five Elements.
The Prime Body's existence originated from the Martial Dao Fruit.