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Sexy Erika Blanc famous from Mario Bava's "Kill Baby Kill" and Emilio Miraglia's "The Night Evelyn Came Out from the Grave" plays a seductress and succubus who spends the night in a Gothic castle along with seven unfortunate tourists,some weird servants and a cursed Baron von Rhoneberg.With the use of the Seven Deadly Sins as a motive,she will kill all that are in the castle.Here is where the fun kicks in,as we are witness to several creative deaths ala guillotine,drowning in gold,gluttony poisoning,iron maiden,falling on spikes,etc."The Devil's Nightmare" offers some nudity plus pretty steamy lesbian scene.The killings are fun and Erica Blanc is dressed in one of the sexiest evening outfits in the history of Eurohorror.The stunning cinematography by Andre Goeffers perfectly captures the majestique of the Gothic castle.7 out of 10.

This is an above average example of the type of metaphysical horror film that seemed to proliferate in Europe in the 1970's.

It's simply the story of the Devil, his minion (the succubus) and seven tourists (each representing one of the seven deadly sins) who are forced to spend the night in a sinister castle.

The first hour is rather plodding due to an over abundance of exposition and very little action. Viewer patience is rewarded however during the final half hour when Ilse (the succubus) starts doing what she does best.

Erica Blanc is superb in this role and her transformation from sexy seductress to ghastly succubus is a highlight. Another highlight is Daniel Emilfork as the Devil. His performance is a real stand out when compared to the rather wooden performances delivered by some of the other cast members.

Director Jean Brismee also deserves kudos for several delightfully imaginative flourishes during the death scenes.

All in all it's worth watching if you're a fan of this type of film, but it's definitely not one of my favourite Euro horror films from this era.

6 out of 10.

This is one of your better Italian Gothic horror films (maybe they should have done more co-productions with Belgium). The simple plot concerns a group of travelers who end up stranded in an eerie castle. The travelers supposedly represent the Seven Deadly Sins (although after "lust", "gluttony", and "greed" I kind of lost track of who was supposed to be who). They are picked off one by one by a sexy female succubus played by the sumptuous Erica Blanc. There have been a million movies like this over the years, but two things set this apart. One is the atmosphere of horror it creates. This film wasn't directed by any of the Italian Gothic horror greats like Mario Bava, Antonio Marghereti, or Riccardo Freda but it evokes their best works ("Black Sunday", "Castle of Blood", "The Ghost"). The second though is Erica Blanc who manages to be both very sexy and very scary (the latter with the help of some good effect make-up). Interestingly, Blanc has only some very brief nude scenes here, but she plays such a seductive and deliciously evil character so well (especially when she preys upon the hapless priest) that she manages to steam up the screen far more than the two Euro-lesbian characters who spend half their screen time cavorting in the nude. Along with her famous coffin strip tease in "The Night Evelyn Came Out of the Grave" this one of Blanc's most memorable roles and worth the price of admission by itself. It's also a pretty good movie though.

I found this movie when I was shopping at Sam Goody. It was on the Nightmares From the Crypt boxed set. What I expected was a crappy, badly dubbed 70s horror film. Instead, I watched a beautifully photographed, and demented horror film. I LOVED the music score! It was absolutely riveting! It managed to build up an atmosphere of dread and foreboding. The lady who played the succubus was just stunning, and the make-up she wore and her performance frightened me. I didn't care too much for the other characters in the film, however. They just seemed one-dimensional and cardboard. I recommend anyone who has respect for Eurohorror films to pick this up, it's quite a rare treat. However, keep this one away from the young ones. It's features a few sexual scenes that were "bold" for it's time, and some disturbing death scenes. Check it out. 9/10.

I saw this as one of 10 horror films on a collection from brentwood DVD called;fright night,its an awesome collection of fright films.anyway the devils nightmare is a Belgium/Italian made shocker about a group of tourists(each one represents one of the 7 deadly sins)they get stranded at the castle of an ex Nazi officer.there's a family curse,gruesome murders,lots of nudity(surprising for 1971)and a very good soundtrack. I'm usually a sucker for good European horror movies especially with the sexy beautiful Erika blanc,who starred in many Italian horror films.sort of like a rival of Barbara Steele.the murders are very gruesome.the dubbing is sloppy but thats expected.i saw this years ago on the USA cable network,of course it was chopped up by the censors. it was hosted by commander USA.who used to show very strange movies. watch the uncut version for the full effect.ignore the critics because most of them dismissed this film as junk.you be the judge.believe me its kind of scary.8 out of 10,Erika blanc gets 10 out of 10 because she was hot.