Pazuzu (The Exorcist) feet, two pairs of wings, a scorpion's tail, and a serpentine penis. Pazuzu first appeared in William Peter Blatty's "The Exorcist" in 1971. The novel is about a 12-year-old girl, Regan MacNeil, possessed by a demon. The demon is later revealed to be Pazuzu; though never explicitly stated to be the demon, two references were made about his statue, which was uncovered in the prologue by Father Lankester Merrin in northern Iraq. After Regan's mother worries about her daughter being possessed, Merrin and Karras arrive at her house and perform an exorcism on Regan and successfully force the demon out
The Exorcist III film), as the protagonist. Blatty conceived "Legion" as a feature film with William Friedkin, director of "The Exorcist", attached to direct. Despite the critical and commercial failure of the previous sequel, Warner Bros. was keen to proceed with Blatty and Friedkin's plans for another "Exorcist" film. Blatty said that "everybody wanted "Exorcist III"... I hadn't written the script, but I had the story in my head...and Billy [Friedkin] loved it." Friedkin, however, soon left the project due to conflicting opinions between him and Blatty on the film. The project went into development hell, and Blatty wrote "Legion" as a novel