An actual Nightmare, a horse from the Netherworld. A horse with a jet-black coat, wild flowing mane and glowing red eyes. Sometimes there is smoke or flames coming from its nostrils. Sometimes it appears to be made of black smoke or darkness. It only rides around at night, and disappears at daylight. It has a beautiful but frightening visage, and anyone seen riding one of these creatures is usually not good or trustworthy, they only let evil beings ride them-- if they let anyone ride at all.