Imp

Imps are found throughout the Lower Planes, either running errands for their infernal masters, spying on rivals, or misleading and waylaying mortals. An imp will proudly serve an evil master of any kind, but it can’t be relied on to carry out tasks with any speed or efficiency.
An imp can assume animal form at will, but in its natural state it resembles a diminutive red-skinned humanoid with a barbed tail, small horns, and leathery wings. It strikes while invisible, attacking with its poison stinger.
Imps can be found in the service to mortal spellcasters, acting as advisors, spies, and familiars. An imp urges its master to acts of evil, knowing the mortal’s soul is a prize the imp might ultimately claim. Imps display an unusual loyalty to their masters, and an imp can be quite dangerous if its master is threatened.