Aside from a freak like Ling Han, whether it was breaking through or improving on the level of Pseudo-Emperor, it was the recovery of the body that would take place first, and then a response from the heaven and earth would be stimulated, so that Pseudo-Emperor could glimpse the Nine Star Regulations, and take advantage of this chance to study it a bit.
Thus, while both may be Five Star Pseudo-Emperors, some could grasp one third of a Nine Star Regulation, but others could not even grasp a sliver. Thus, the gap in battle prowess would naturally be huge.
It was also because of this that Ling Han was confident that he could help a Saint become a Pseudo-Emperor.
It was not difficult to revive one's body with the essence of Life.
