"After losing to the Old Fist God years ago, Shan Liangyi must have undergone multiple reincarnations and accumulations. The Xuanwu you know should only be one generation among them," said Gua Tianshi. "Originally, Shan Liangyi would never consider leaving a successor to the next generation, even if that successor has the potential to become Impermanence.
"The reason is simple, because Shan Liangyi has infinite time and opportunities. As long as he continues to reincarnate and accumulate, he will eventually reach his ideal state. Perhaps a successor is a candidate for Impermanence, but so what? Instead of waiting for them to become Impermanence someday, it's better to harvest them and immediately start the next reincarnation.