Speedy Progress Overnight

Mere minutes passed and the duo could already sense their Inner World forming more essence marks. And that their Spiritual Sea is broadening past their previous limits, breaching into higher levels of understanding. 

In this state, Cain and Amber had one critical thought. A thought that caused the duo's entire being to violently quiver. 

As Elder Heng explained, martial cultivators aren't meant to follow any path of the heaven or try to copy the power of the universe. Rather, they comprehend the rules and principles of the universe to form their own powers of a universe! 

The essence Marks of an Inner World symbolizes the creation of one's own unique power.

It's why forming essence Marks, whether its Laws or Divine Qi fill, takes a lengthy amount of time. All Martial Cultivators are creating their own unique energy principles off on the fundamental understanding of the principles of the current universe.