C81 Dark deep

"Opportunity and risk coexist. The most important mission that my Tianshan Mountains have sent their disciples to the Dragon Locking Abyss is to find a lone copy of the Heaven Mountain Immortal Sword Art, the < Demon Resisting Sword Technique >. However, so far, including my generation, no one has been able to find it. This time, I hope that Young Master Lu can help me find a lone root