Nine Heavens Sword Demon.

Summary

The Demon King, after years of effort, finally completed a powerful black jade slip and summoned Nie Feng and an alchemist to the great hall. Meanwhile, Nie Feng engaged in intense battles, defeating multiple Hu Tiger guards and reaching the peak of the Bone Refinement stage. His cultivation improved significantly through relentless fighting and the guidance of Yan Huang, who humorously challenged him to face even more guards. Upon the Demon King's return, he noted the chaotic state of the cave but was pleased with Nie Feng's progress. The Demon King informed Nie Feng that his companions, especially Huo Ling, were waiting for him, revealing her concern during his absence.

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