Monochros

A horse with a single horn coming from its forehead, known for its black body and mesmerizingly pink mane and tail. Its very nature is surrounded in mystery as very few have ever been seen, and there doesn't seem to be any relation between places they were spotted. What is known is that they tend to be drawn in by the strong emotions of humans, an the more negative emotions like sadness, regret, and pain that a monochros absorbs, the more violent they become.