Dafeng is terrified by the Onyx Serpent, <class>. We must help him face that fear, or face it for him ourselves.
When I told Ji of the serpent, he said he had an idea and would begin preparations outside of the chamber. Despite his rash nature, I must admit, I envy his passion and conviction.
Find Ji outside and confront the Onyx Serpent.
Completion
You have helped Dafeng find his courage! The final spirit has been restored.