Eladrin

Three thousand years ago, when Lolth and the drow were warring against Corellon, a large number of elves hid themselves in the Feywild in order to escape the chaos. For reasons that have long since been forgotten, the Feywild became disjoined from the material plane and all connection between the two was severed, trapping all of its inhabitants. The elves that remained in the Feywild were effected by the energies there, and over the course of the millennia they gradually transformed into an entirely separate race from their elven cousins.