I had a recurring dream as a child about a mummy my father said used to live in his attic when he was a child. I never saw its face in the dreams though. I'd always wake up before it got that close to me. To get to the attic, you had to go through a long dark closet and there was only a dimly lit light bulb hanging halfway in. All the way at the back of the closet was the door to the attic. It was terrifying as a child.
Years later, a friend of mine made up this character called the Greeper. It is a skulking, elusive and vicious creature that prefers dark spaces. For some reason, I tied the mummy and the Greeper together into one being.