Nightmare

Nightmares are horse-like fiends.

Description
Nightmares appear like black horses with their hooves, manes, and tails aflame.

Abilities
The following abilities are taken from the Monster Manual, 5th Ed., but have not been demonstrated onstream.
 * Confer Fire Resistance: The nightmare can give its rider resistance to fire damage.
 * Illumination: Sheds bright light in a 10-foot radius, and dim light for 10 feet around that.
 * Ethereal Stride: As an action, the nightmare and up to three willing creatures magically move between the Material Plane and the Ethereal Plane.

History
After Drath Mephruhn implanted a phylactery in Grog Strongjaw's chest, Vox Machina sought help to remove the artifact safely before Drath could possess Grog's body. To perform the necessary ritual, Eskil Ryndarien sent the party on a quest to retrieve two components, one of which was the skull of a nightmare. Ryndarien had heard rumors of a cult near Jorenn Village that danced with a fiery horse, and so half the party investigated there. They learned from Percival de Rolo about the cult, broke Percival out of prison, and together confronted the nightmare and its rider, a narzugon. After slaying the nightmare, they brought the skull back to Ryndarien, who used it to perform the ritual.

Trivia
In, the lich Conan O'Brien rides a nightmare.