Nightmare

"'Protect thyself ere the Nightmare comes to foment in thy misery, for it shall not leave thou untouched.'"Rel'Nurei that take on the guise of one's greatest fears, the Nightmare is a harbinger of fear and dread, though it does not seek to particularly harm any living creature. They are often accompanied by a group of Phantoms, Rel'Nurei that feast on emotions of negativity.

Appearance
Nightmares are unique creatures in that they have one "true form" that is pre-determined by the beholder.

Powers
The creatures give off an extremely powerful aura of pure fear, which even magic cannot suppress. Being in close proximity to a Nightmare for longer than a few minutes will most certainly kill a living being through sheer terror. It is said that Laftriess du Barry holds several of these creatures captive, as they are one of the best tools for her psychological torture.