Star elf

Star Elves (or Mithral elves as they used to be known), like Sun elves have only recently ventured back into Faerunian life.

History
2000 years ago the star elves retreated into the realm of Sildeyuir when the threat of human refugees from Unther carving up their realm of Yuireshanyaar proved too much for them to bear. The elven high mages created a network of stone circles that conducted a spell that was then cast to create the demi-plane of Sildeyuir. The star elves of the Yuirwood retreated to this plane and stayed there until recently, forced out by alien sorcerors called Nilshais who corrupt their home with strange magicks.

Appearance
Star elves look a lot like moon elves with one key difference, a small light source that hovers in front of their forehead. Also, unlike moon elves star elves are sometimes born with red hair.

Behind the scenes
This lightsource is never mentioned, not even in the sourcebook in which the subrace first appears: Unapproachable East. It provides no further benefit to the race and as such can only be assumed that it is not visible (at least on the prime material plane).