Shadar-Kai

"Shadar-kai, also known as shadow fey, were a race of shadow-like fey connected to the Shadowfell. They were believed to have originated as an offshoot of elves associated with the Raven Queen, although other legends as to their origins also existed, as well as shadar-kai who were connected to other deities and processes related with the Shadowfell.
Some shadar-kai resembled blighted elves, in a perpetual state between life and death, while others were human-like in appearance. They were usually slender and ranged from slightly taller to slightly shorter than humans, exhibiting graceful movements well suited to stealth.
They had dusky gray skin and colorless complexions that varied from alabaster to dark gray; black hair, with few shadar-kai having pale hair, that ranged within the range of human hair colors; and dark eyes lacking any sclera or clear pupil. Shadows on their bodies or clothing always seemed to be deeper and darker than shadows elsewhere, and shadow seemed to follow them and reach out, especially when they were angry. They were easily lost from view. Many Shadar-Kai displayed all kinds of iron body piercings in nose, ears, eyebrows, shoulders, and other parts of the body, and purple-inked tattoos on body, limbs, and face." - from the journal of Old Jass