Jaela Daran Fan Club
Tieflings are humans with infernal or abyssal blood in their veins. Humans with bloodlines from creatures of elemental planes also live in the ranks of tieflings. Their appearances vary, and many are able to hide their heritage, through minor magic or mundane disguises. Common characteristics include cloven hooves, vestigial wings, a strong odor of smoke or brimstone, and goat horns.
Also, some tieflings are actually demons or devils in human form. Lesser fiends are more powerful as trained adventurers, and releasing the powers of their heritage is just another trick up their sleeve. Greater fiends, however, are greatly weakened when in human form, and have a reason to be confined to a mortal body. A common example of this case, is when a demon is destroyed on the material plane, and instead of returning to their original plane, they possess a weak or willing host, in order to plot revenge.
The largest concentration of Tieflings is in the Sarlonan nation of Ohr Kaluun, where its leaders made a pact with the devils, and was destroyed by angels. Many, if not most, of those survivors fled to Khorvaire. The largest population of tieflings in Khorvaire is in the Venmous Demesne in the Demon Wastes. Lesser populations include the Shadow Marches, Droaam, the Eldeen Reaches, and rural parts of Aundair.