Beemish

A paranormal Lebanese monster of unknown origins, who can come into your dreams and cause a nightmare.

Physical attacks causing grievous injury/amputation or death after waking up are rare, but can occur, mostly to children, especially those on the Autism spectrum.

Little is known about this entity due to sightings being extremely rare and usually brushed off as a hallucination.
One is not likely to encounter the being more than once, however If seen a second time, seek help immediately.