There are two major groups of tieflings found in the world. The elder tieflings are descendents of Bael Turathi who somehow escaped the mutual destruction of their Empire and Arkhosia. More recently, a number of Nerathi nobles entered into a pact with one of the archdevils, most likely Asmodeus himself, one result of which was a new generation of tieflings. Both groups are effectively indistinguishable, and any particular tiefling may claim whichever heritage suits him at the time. Most scholars believe that the latest pact was a failed ploy to grant Bael Turath rebirth through control of Nerath.