Dark/Silver Hand of the Moon
One of the two Aasimar originally associated with the moon(s); her name refers to the dark side of the moon, but also the Second Moon, which collided with the world and formed a pseudo-continent off what is now the South East coast of The Kingdom of Lux.
Aluvyn’dralia and Silvyn’dralia took different methods to protect the world. Aluvyn’dralia was a guardian and shepherd of mortals, where Silvyn’dralia harnessed a dark and malicious magic to hide the world from the Beast of a Thousand Eyes (but also subject the world to a marginally less evil darkness).
Seen in a vision of Sylas’s from before the Cataclysm, dressed in black armor but otherwise identical to Aluvyn’dralia, and slamming a sword into a runic circle that fired a beam of light that cracked the one remaining moon in the sky.