Song Yiren still found it hard to believe.
The Heavenly Mountain Sword Technique was undoubtedly exquisite, but this book only contained the most basic sword moves, easily purchasable outside.
Even if one practiced according to this sword manual completely, it amounted to nothing more than empty form without any power.
Such a top-tier sword technique, its essence lay in the exquisite changes between sword moves, a sect's top secret accessible only to core disciples of the Heavenly Mountain Sect. It was impossible to detail such secrets in a book.
Li Nuo, of course, could not possibly be a core disciple of the Heavenly Mountain Sect.
Even if he were, with his age, it was impossible for him to have mastered the swordsmanship so proficiently.
The moves he had demonstrated earlier were not only coherent but had also manifested the spirit of swordsmanship, indicating at least thirty years of practice.