In the Beast Emperor's Mausoleum, Kai Syaoran had already broken through to become a Beast Duke equivalent to the Heaven Monarch realm.
He had spent the past three years fighting constantly against the humanoid creatures that had lost their minds. He had found out why the Beast Emperor's mausoleum. The swirling darkness corru[ted and destroyed souls. This left these humans as moving soulless creatures with nothing but instincts left within the soul fragments they had left.
Kai Syaoran had been spared this sorry fate since his soul was very unique. He had just the soul core.
When he discovered that the mausoleum posed no harm to him, he decided to stay inside and cultivate while letting his clones do all the work outside.
He had been concentrating on this spear all along. After cultivating, he would practice his spear by fighting the powerful soulless beings and the ferocious beasts. His understanding of the way of the spear had increased greatly.