Nughlhuu is a quadruped that resembles a unicorn. Black liquid permanently drips from his lean, almost starved body. It is said that whoever gazes into the light emanating from the horn on his head will forever be turned to stone and suffer demonic torment as he is slowly eaten away by Nycalhu and Nugaa. Nughlhuu's two companions have the form of skeletal birds, from whose pale bones the moldering feathers hang down.
There are also reports of a small herd of black unicorns, with fiery red eyes. They are said to be the children of Nughlhuu and that is also their name. Unlike the unicorn, however, which is otherwise revered by almost all cultures throughout Tirakan, these are abysmally corrupt and feed exclusively on the flesh of thinking beings. Rarely do human demonologists seek out these creatures, however, it is reported that there are elfish demonologists who seek out individual animals. demonologists who can call individual animals of the herd of the children of Nughlhuus as mounts or that they can even call Nycalhu and Nugaa who can then pounce on a victim and skeletonise it within a very short time. A legend of the pointed ears also reports that there are high pactors who grew a horn themselves and who became emaciated and more and more took on the form of Nughlhuus until they died.
Nughluu is the messenger of Ishaa'Nra, he is the timeless transmitter of an unnatural, cold death.