This move, Sundering Stars, was just Ye Yuan's comprehensions in the Sword Tomb's first two levels.
At that time, he was comprehending in the second level, finally triggering the Chaos Heavenspan Canon's reaction, forming the elementary form of a Sword Dao martial technique.
Ye Yuan used a year's time to continuously perfect, only then, was there Sundering Stars.
However, the first two levels' Sword Dao laws were far from the extent of reaching grand completion Sword Dao first-layered heaven.
For Sundering Stars to have such power, on the one hand, it was because of the strength of the martial technique itself.
While on the other hand, it was because of the powerful cultivation method that Ye Yuan trained in!