Duppy
The Duppy is a form of ghost from the West Indies. They are believed to be all the evil that escapes the body after death. This evil takes a semi-corporeal form and can be summoned and bound to be used as servants or weapons. They can be summoned accidentally by playing cards near the grave of someone recently deceased. Pouring rum and some silver coins into a grave can cause the Duppy to take form. If the summoner loses control of the Duppy, it will destroy everything they love, and then brutally kill them. They cannot be stopped at night, but you can scatter tobacco seeds to distract the Duppy for hours. In sunlight, the Duppy is nearly powerless.
Citations:
Maberry, Jonathan. Vampire Universe: The Dark World of Supernatural Beings That Haunt Us, Hunt Us, and Hunger for Us. United States, Kensington Publishing Corporation, 2006.