As for divine skills, the Mu Clan's collection was comparatively sparse, with fewer than a hundred volumes.
Moreover, the highest-ranked one was merely the seventh-grade divine skill Mu Guiqing cultivated, "Shatter the Firmament."
Divine skills had one characteristic: the lower their grade, the easier they were to begin learning, but the harder it was to cultivate them to mastery.
However, that did not mean lower-grade divine skills were weaker than higher-grade ones.
For instance, although Jiang Feng's "Flame-Splitting Thirteen Flowing Cloud Thrust" was only the lowest, tenth-grade divine skill, once cultivated to the extreme, it could instantly unleash thirteen attacks. The might released when those thirteen attacks merged into one was enough to surpass "Shatter the Firmament" at its utmost mastery.
But correspondingly, cultivating "Flame-Splitting Thirteen Flowing Cloud Thrust" to the extreme was far more difficult than cultivating "Shatter the Firmament" to the extreme!
With Jiang Feng's abilities, after such long tempering—even enduring countless deaths during the second trial of the Nether Tower—he had only cultivated "Flame-Splitting Thirteen Flowing Cloud Thrust" to the point where he could release three spear lights.
One could imagine just how difficult it was to cultivate this divine skill to its extreme and unleash thirteen attacks!
Because divine skills were so profound and mysterious, Jiang Feng spent a full three thousand years using divine books to record and thoroughly absorb the Mu Clan's foundation of fewer than a hundred divine skills. He then spent another two thousand years improving "Flame-Splitting Thirteen Flowing Cloud Thrust."
The improved "Flame-Splitting Thirteen Flowing Cloud Thrust" incorporated the characteristics of Mu Guiqing's "Shatter the Firmament," directly reaching the level of a seventh-grade skill. Not only had its power increased severalfold compared to before, but the difficulty of cultivating it had also dropped considerably.
Thanks to having improved it himself, Jiang