The Authentic Red Dragon And The Black Hen: Nebiros, Field Marshal and Inspector General, has the power to inflict harm on whomever he wants; he discovers the Hand of Glory, he gives instruction on the qualities of metals, minerals, plants and all the pure and impure animals. He also has possession of the art of predicting the future, and is one of the greatest necromancers of all the infernal Spirits: he goes everywhere; he inspects all the infernal militias. He has under him Ayperos, Naberus, and Glasialabolas, etc. etc.
Dictionnaire Infernal: Naberus, also called Nebiros, Marquis of the Dark Empire, Marshal of camp and inspector general of the armies. He shows himself under the figure of a crow; his voice is hoarse; he gives eloquence, friendliness and teaches the liberal arts. He finds the hand of glory; he indicates the qualities of metals, plants and all animals clean and unclean; one of the leaders of the necromancers, he predicts the future. He commands nineteen legions.
Caacrinolaas (aka Caassimolar, Glassia-labolas) is a high president of hell who commands 36 legions. He appears as a dog with griffin wings. He teaches liberal arts, inspires murder, makes men invisible, and predicts the future. In the Great Grimoire, he is called Classyalabolas, a sergeant sometimes mounted to Nebiros or Naberus.
Pseudomonarchia Daemonum: Naberius, alias Cerberus, is a valiant marquesse, shewing himselfe in the forme of a crowe, when he speaketh with a hoarse voice: he maketh a man amiable and cunning in all arts, and speciallie in rhetorike, he procureth the losse of prelacies and dignities: nineteene legions heare and obeie him.
Grimorium Verum: The two subordinates of Astaroth are Sagatana and Nesbiros.
The Lesser Key of Solomon: The Twenty-fourth Spirit is Naberius. He is a most valiant Marquis, and showeth in the form of a Black Crane, fluttering about the Circle, and when he speaketh it is with a hoarse voice. He maketh men cunning in all Arts and Sciences, but especially in the Art of Rhetoric. He restoreth lost Dignities and Honours. He governeth 19 Legions of Spirits.
Livre des Esperitz: Cerberus is a great marquis who is a master in all sciences and a great man in honors and riches / and has 19 legions
Other references:
V.K. JEHANNUM: Naberius is a psychopomp who rules the barrier between our world and the spirit plane. In Greek mythology, he acts to prevent the escape of the dead from the underworld. He rules over the faculties of psychic perception, the True Will, alchemy, the Great Work, the bestial manifestation of the Higher Self as the Spirit Animal, mirrormancy, vehicle enchantment, shadowmancy, stellar magick, warding, lunar magick, scrying, tarot divination, pyromancy, hydromancy, necromancy, prescience, the use of fire in magick, and death magick. He can inflict suffering, assault, and tragedy upon any given person.
Naberius can be called upon to control an animal and coerce it to harm things or persons. He can reveal the Hand of Glory help the magickian commune with the Planetary Spirit of the Earth. The spirit can be called upon to give assistance in matters of protection and travel, as well as engender introspective epiphanies of self-understanding and help the magickian overcome addiction. He has authority over the underworld of Greek Paganism as well as Da'ath and a third spirit plane.
Naberus can restore lost dignities and honors or divest a person of them. While he is said to present himself as amiable, fair, friendly, and eloquent, his presence intimidates many practitioners of demon magick- which is to say that he emanates fear like Aosoth and Merihim do. This fear will strengthen the spiritual faculties of the witch and strike down mental barriers to spiritual/psychic perception and sorcerous manifestation. Perhaps he only does this sometimes.
Naberius is an insanely powerful and wicked smart emissary of Hecate. He imparts confidence, strength, and courage in the witch. He helps the black magickian do the right thing, conduct herself with honor, and stand up for what she believes in even when it's hard or scary to do so.
Naberus makes a man knowledgeable of all arts and sciences- especially rhetoric. He is knowledgeable regarding meteorology, vehicle maintenance, nutrition, neurology, and astrology alike. He can teach the witch about the nature and magickal properties of given vegetables, metals, minerals, and animals. He can give much guidance to preppers and lend guidance in the act of physically barricading/fortifying a home.
Associations:
NAMES: Naberius, Nuberus, Nebiros, Nesbiros, Naberus, Naburus, Naberios, Cerberos, Cerbere, Cerberus, Kerberos
SUPERIORS: Astaroth, Tezrian, Uriens, Rahab
SUBORDINATES: Ipes, Alefpene'ash, Glasya-Labolas, Ornias
DIRECTION: East, North
PLANETS: Moon, Venus, Neptune, Uranus, Pluto
METAL: Silver, neptunium, tin
ELEMENT: Air, earth, fire
COLOR: Violet, indigo, green, red, black, white
BOTANICALS AND AROMATICS: Ash wood, jasmine, mullein, wormwood, elderberry
TAROT: Seven of cups
ZODIAC: Scorpio
GEMATRIA: 252
DATE: November 13th to November 22nd, July 18th to July 22nd, Winter Solstice, Halloween, New Year's Eve
RANK: Marquis, Field Marshall, Inspector General
The Red Dragon, pg. 36
Grimorium Verum, pg. 13
The Lesser Key of Solomon, pg. 29