Shadowsoul is a sub-type of the Fairest seeming. They are changelings who are the antithesis of the Bright Ones. These fae are the most beautiful chosen of the nigh. Their beauty comes from the darkness they swathe themselves in rather than the light they radiate. They were the favored concubines, adornments and handmaidens to nocturnal Keepers, and are distant cousins to the Darklings. The Shadowsoul’s blessing is the Unnatural Chill.
- Winter Masques, p. 84