>the pale dweller is a real character from a 19th century book about Agartha
This is such a blessed setting.

>Etidorhpa
>The book purports to be a manuscript dictated by a strange being named I-Am-The-Man to a man named Llewyllyn Drury. Drury's adventure culminates in a trek through a cave in Kentucky into the core of the earth. Ideas presented in Etidorhpa include practical alchemy, secret Masonic orders, the Hollow Earth theory, and the concept of transcending the physical realm.