Prelude to The Ring?
or any other Jhorror flick featuring a ghost/zombie girl with long black hair over her face/half her face and a long white night gown on and her hands hanging limply by her sides in that uncannily menacing way (how is that anyway? - I mean her hands are down by her sides but it looks totally threatening!?). Does anyone else who has seen this movie see the resemblance to The Ring's Samara in the end sequence. This film came first, that's for sure, and the final sequence really rocks, except for a weird jump-cut when the two ghosts/zombies vanish (as if they couldn't quite figure out how to pull off the effect so just cut back to the scene with the actors gone - which is how I did it on Super 8 when I was a kid)). I believe this final sequence might possibly have inspired the novelist and later on the filmmakers when whjo wrote/made Ringu/The Ring. The main storyline is even similar when you think about it: a dead girl/woman whose remains are trapped in a statue in the house (it's her heart instead of a body in a well al la The Ring), whose ghost is haunting the house and killing people, and who can't be stopped until her heart is found and destroyed. The Ring deviates of course when it's revealed that Samara still ain't "dead" again even after her malevolent little skeleton is pulled out of the well and buried.
Anyway, Nightmare Castle has a great opening (as the reviewer said) a boring middle and the end -- I say again -- is totally a prelude to The Ring and it ROCKS!