The artifact containing the Blood of Christ seems to have rolled in from the set of Tales from the Crypt: Demon Knight.
It’s too kind to say borrowed-from, so let’s say this film outright bastardizes films like Demon Knight, Beauty and the Beast, Dracula, Silent Hill, A Nightmare on Elm Street 5: The Dream Child, and even The Serpent and the Rainbow.
That being said, The Nun does feature some truly inspired moments of gothic horror, particularly a harrowing sequence involving Farmiga’s character being whipped violently during an attack by Valak, and while I may have uttered the words “Demon Knight” a few times during the movie’s conclusion, I must admit that I applaud The Nun for just full on embracing its Hammer Horror-esque tendencies during the film’s final showdown between good and evil.
The biggest jump scare is a riff on The Exorcist III and the climax climax flogs a major beat from Demon Knight.
There are also aspects of the climax that seem to be derivative of Demon Knight .