Tiefling

When someone strikes a pact with one of the overlords of The Nine Hells, their entire bloodline is infused with their essence. This causes their future generations to become a Tiefling.
They have appearances similar to Humans, Elves or Dwarves they have horns that take any of a variety of shapes: some have curling horns like a ram, others have straight and tall horns like a gazelle’s, and some spiral upward like an antelopes’ horns. They have thick tails, four to five feet long, which lash or coil around their legs when they get upset or nervous. Their canine teeth are sharply pointed, and their eyes are solid colors—black, red, white, silver, or gold—with no visible sclera or pupil. Their skin tones cover the full range of human coloration, but also include various shades of red. Their hair, cascading down from behind their horns, is usually dark, from black or brown to dark red, blue, or purple.
Because of this curse, civilians can get an idea of their ancestors sins by simply looking at the Tieflings. They are often chased out of towns, inns or taverns because of their appearance and many fear them because of their ancestors actions.