Prompt ~ Freak (noun)
The unicorn is the only animal that Noah forgot to load on the ark and as such there are no unicorns on this earth. However, the spirit of some unicorns returns to haunt the human race for this omission by their ancestors.
Such a person can be recognized by a horn on the forehead. Being good to the haunted person is a sure cure for all types of sickness and poisonings. Often one can see a rainbow in their eyes or their smiles. The uninformed call them a freak.
The medical fraternity in its ignorance labels such human unicorns to be victims of cornu cutaneum and cut off their horns.