This month's Unearthed Arcana article gives us four new elf subraces to playtest. "After the positive response to the eladrin a couple of months ago in Unearthed Arcana, we decided to explore four more elf subraces: avariel (winged elves), grugach (the wild elves of Greyhawk), sea elves, and shadar-kai (deathly servants of the Raven Queen)."