Huang Xiaolong's flying sword technique was a secret transmission of the Taoist school and it was no longer within the realm of ancient martial arts!
However, the "Aerial Flying Sword" that Huang Xiaolong had hastily refined was really too crude. A true flying sword, first and foremost, required the selection of an excellent treasure sword, a famous sword, and then one must use their own Taoist power to inscribe talismans and formations on the blade, followed by a blood sacrifice to refine it. Once completed, its power was astounding, allowing one to command it with their mind, beheading an enemy thousands of miles away, impervious to water and fire. Ancient Taoists, when deploying flying swords, could slay zombies, fierce ghosts, and lost souls with composure and ease.
Even a flying sword made in haste was a flying sword personally crafted by the Yin Emperor!