Tales of Tolgard
Half-fiends, as a race, are evil aligned humanoids. They are usually the result of the successful mating between a human and a fiend, although fiends have been known to mate with other humanoids from time to time. Half-fiends can use their darkvision to plumb a shadow’s depths up to 60 feet. There is no way, short of major magical intervention, that the half-fiend can hide its ancestry. Depending upon whether the fiend was a demon or devil will determine whether the half-fiend has chaotic or lawful tendencies.