There is many things I am writing and researching on for Doctor Strange. Listing the following:
The Sanctum Sanctorum and how it is a living organism.
The doctor + metamorphosis (and exuding cosmic darkness... transgender horror/allegory...).
Appearances. Wardrobe. And how his presence gives off to others (especially humans). You slowly hallucinate.
The other world the doctor resides in. To access, you must go through a desert followed by bizarre stages of sorts... think The Holy Mountain (1973).