Supernatural: Fallen Stars
Alp is described as a small creature that sits on the chest of a sleeping person whispering nightmares into their ear. Many hunters feel that it is connected to a Djinn that feeds of fear from these nightmares. It is said that they too have an alpha.
These creatures can be killed with an angel blade, the Colt, a Demon Blade or similar forces. They can be warded off with salt and can be driven off with salt or iron too.