C301 Muven

Zhang Haorann borrowed the Yin Yang Eye's endless space, which was originally the place with the most dead aura. After being poured into it by the Universe Vital Energy, it perfectly merged with the dead aura and formed a unique Yin Yang Power.

The Yin Yang Power covered the entire Netherworld Sword, Zhang Haorann named it the "Profound Yin Swordsmanship"