Taiyin 13 Swords existed in two versions. The earliest, original form was created by True Lord Taiyin, while the widespread version was later refined by the Earthly Preceptor Xu Wugui. After True Lord Taiyin was recruited into the Daoist Order, she accepted Xu Wugui’s improvements, and the two versions eventually converged.0

Although Qi Xuansu had obtained the Taiyin 13 Swords with relative ease, his version was far less natural and fluid than one painstakingly cultivated through personal practice. Each time he wished to use it, he had to activate his Spiritual Body. Otherwise, he would not be able to use the technique. In essence, his skill was borrowed, akin to invoking a divine descent.0

Since it required the Spiritual Body, he could not cultivate sword slaves, and naturally could not employ the Taiyin Sword Formation, which required the cooperation of 13 such slaves.0

Beyond the necessity of the Spiritual Body, this borrowed skill had further limitations. Those who trained in the Taiyin 13 Swords through their own efforts could even innovate upon the original framework. But borrowed techniques were rigid and could not be altered, since...0