Many demons belong to the race of evil outsiders known as the tanar'ri. Tanar'ri are, in the broadest terms, chaos and evil defined. The less intelligent often attack without question and fight until slain. True and greater tanar'ri often roam the Astral and Ethereal Planes -- their attention is attracted by those in an ethereal state.
Traits: A tanar'ri possesses the following traits (unless otherwise noted in a creature's entry).
- Immunity to electricity and poison.
- Resistance to acid 10, cold 10, and fire 10.
- Summon (Sp): Tanar'ri share the ability to summon others of their kind (the success chance and type of tanar'ri summoned are noted in each monster description).
See also: Wikipedia entry on Tanar'ri