I watched this movie as a child, and I would like to watch it again.
These people are trapped in a house and there is a box full of heads that was supposed to stay buried so the spirits wouldn’t disturb the house. There is a ghost lady thing who is playing the piano in a white dress and her fingers are bleeding onto the piano keys. Then whenever she gets up, her shoes are black pointed toe boots that drag the floor as she floats across the room.
The windows and doors are all locked shut so the people cannot get out of the house. There are ghost or entities in the house that the people cannot see and a lady is getting her neck cut by an entity with glass and all her friends can see is glass cutting her throat. And the ghost lady is in the bathroom on the roof looking down on the other people are trying to escape.