There were ancestors in the Hall of Swords whose chi mountain had collapsed. But for those ancestors, their mountain had collapsed because it had been destroyed by others. None of the cases were like this, where a sword spirit had appeared.
Thus, from the look of things, the sword spirits of the ancestors most likely died when the mountain was destroyed. But Lu Shu was different. He had bred a sword spirit.
Li Xianyi suddenly realized that Lu Shu may have been the first to do so in the Hall of Swords.
The method to unlock the sea of chi was to develop the body. Many schools of thought felt that humans had boundless potential, hence the secret to one's body development was to go against the natural order of training.
Lu Shu had discovered the method to breed sword spirits. There was no doubt that he had found a new path and excavated new potential. This discovery would definitely land Lu Shu in the Hall of Swords' historical records.