An old Nascent Soul cultivator self-destructs, and his soul transmigrates into the body of Niu Lai, a village idiot.
When a local thug tries to make him eat dog droppings, a fireball burns the man to ash the very next moment.
The villagers think he's still the village watchman everyone can bully, never realizing that an eight-hundred-year-old cultivator sits inside that dilapidated house.
In Blue Star, where spiritual energy is scarce, he starts by guarding the village, refining cauldrons and subduing demons as he resumes his cultivation, until ten thousand immortals come to pay their respects.
I have read a few chapters, they are well written and interesting, please update more.