What's the name of the ghost king?

2022-03- 16 Answer to The Return of the Spell, it is called Uncle Double-faced Exorcist because the Double-faced Exorcist was the king of curses thousands of years ago and was possessed by the people of Hudayou. Coupled with his natural freedom, he doesn't like being bound by anyone, and he acts entirely on his own will, so he has the behavior of exorcism.

Twenty fingers cut off after the death of the double-faced exorcist were made into special spells, sealed up and scattered all over Japan. After being swallowed by Polygonum cuspidatum, it is parasitic in its body and shares its body with Polygonum cuspidatum, but it cannot fully master and control its own body.