I don't understand the fairy tale of snake spirit disease

It is not scary for ordinary people to act as a snake spirit, but when a snake spirit with a mental illness certificate pretends to be a normal person, and is going to turn a normal person into a patient... well, when this snake spirit is about to implement the plan, he is caught by a group of people. Only the sj system has been pulled into a game with a fairy tale background, the goal: to assimilate the strategy target into a patient!But... These npcs are more like snake spirits than him! ! !Content tags: Fantasy Magic System Sweet Text Quick Travel┃ Search keywords: Protagonist: Xu Yao┃ Supporting role: None