Imps (also known as fel sprites) are evil immortals who feed upon life and magic. They had been formed as a result of the Light and Void energies that had bled together at the borders of the Twisting Nether.
Professions of the Cosmos
Warlocks bind demons to their will and at first, warlocks command only the service of imps. Though an imp lacks physical strength, it possesses powers and a cleverness that will serve a warlock well.
Are Imps Astral Entities Or Nonphysical Beings?
Are Imps Scions Of The Fel-Tainted Tree Teldrassil?
The Old English noun impa meant a young shoot or scion of a plant or tree, and later came to mean the scion of a noble house, or a child in general. Starting in the 16th century, it was often used in expressions like "imps of serpents", "imp of hell", "imp of the devil", and so on; and by the 17th century, it came to mean a small demon, a familiar of a witch. The Old English noun and associated verb impian appear to come from an unattested Late Latin term *emputa (impotus is attested in the Salic Law), the neuter plural of Greek ἔμϕυτος 'natural, implanted, grafted'.
Apparently originating from Germanic folklore, a small lesser goblin is what the imp was considered. Imps have also been described as being "bound" or contained in some sort of object, such as a sword or crystal ball. Imps, in other instances, were kept in particular objects and conjured only when their masters had need of them.