I've seen a few people refer to this as Lamberto Bava's remake of his father's BLACK SUNDAY(a.k.a. THE MASK OF SATAN) but after watching it I think it's definitely more in the crappy rip-off department. The only thing that it takes from Mario Bava's film is the whole mask with the spikes in it thing and a witch who comes back and gets revenge. It also goes under the alternate title BLACK SUNDAY which is pretty ballsy for such a shitty imitation. The majority of the plot varies greatly from the original SUNDAY film though and is unfortunately way less stylish and iconic. Also we have no one here that is anywhere near the great Barbara Steele so they let a guy be the lead and he seems like an extremely dumb fellow throughout.
The movie starts of with a bunch of nitwit skiers who end up trapped in an ice-cave where they unleash some evil forces. Pretty quickly things stop making sense until we devolve into one of those- "was it a dream or did it really happen"-types of stories, and I hate those! Needless to say this was not a fun watch. Perhaps the fact that it was originally made for Spanish TV may have been a big reason. For a TV movie though it does feature a bit of nudity and gore which I doubt you would see in anything made for TV here in America.
This one is also alternately known as DEMONS 5:THE DEVIL'S VEIL which kind of makes sense since our group do sorta resemble the monsters from DEMONS and all the DEMONS sequels I've seen(besides part 2) are terrible!