Hi all

Long time ago(in the 80's) after got back from school I watched a horror movie on tv which was about a guy who had his heart stolen and put inside of a box, if I can remember it was a spell and who did that could control his life.
That heartless guy went to a mansion where he thought he would find that box with his heart, I remember there was a cave, another guy who could turn himself into a monster and a talisman which could keep him away while turnedinto a monster.I remember that heartless guy entered in that cave and found half part of that talisman, he hang it in that cave doors to hold that creature outside while he was searching for that box.It was all about a sacrifice or something, I guess its a british movie.
I was a kid so I don't remember any actor but it's an old movie with bad quality but it was fun watching it and I'd like to watch it again.The name Scorpion keeps coming to my mind but I found nothing.
Do any one of you know its name?
Thanks