What movie or TV show comes to your mind when you hear this description? For me, it's Hellraiser. The coolest thing about it is the cenobites, but they're in it for about 10 minutes MAX. The rest of the film has you following a family painfully aloof to the fact that there's a corpse emerging from the floorboard in the attic, while the stepmother is feeding him fresh bodies to regain his strength. It has some squeamish/cool sequences sure, but the whole thing about this puzzle box and Pinhead is a lot cooler.