Darkborns are shown to have steel grey eyes. They are abnormally tall, well over seven foot. They are the only supernatural beings that can make incubi look weak.
Darkborns are immune to all caster powers except the powers of Cataclysts. If a Siren used their power of persuasion on a Darkborn, the Darkborn would hear the irresistible Siren call but would not respond to it. They are also faster and stronger than incubi.