While most
tieflings resist fire, those whose ancestry can be traced back to
Stygia, the frozen fifth layer of the
Nine Hells, will sometimes find their power based in cold rather than flame. These are individuals with the blood of
ice devils flowing through their veins, or even that of the archdevil
Levistus himself. The skin of these tieflings is bluish-white like ice or blackish-purple like frostbite, and their horns are always crystalline, as if they were sculpted from ice.