Cassiopeian Dream Eater

Cassiopeian Dream Eater is an alien organism that attaches itself to the face of its host, then feeds off of the chemicals produced by the brain during stress by trapping the host in a nightmare.

Powers and abilities
The Dream Eater has a very strong grip on its host, and is impossible to remove without ripping the victim's face off.

Weaknesses
The Dream Eater can be removed by a Galvan doctor.