Spectres of the Last War
The fey race of the eladrin are thought to be newcomers to Eberron but in fact they are ancient. For millennia they have lived in their feyspires, shining cities that exist in the Feywild. At certain conjunctions between the Feywild and Eberron, the gleaming towers would appear and the eladrin would experience the world. In once case a feyspire was conquered by the giants of Xen’drik and its denizens taken as slaves. These slaves eventually became elves and drow after years of magical experimentation by the giants. On the Day of Mourning, the feyspires were separated permanently from the Feywild and eladrin are now stuck in Eberron for good. Most eladrin worship their own ancestors.
Eladrin do not manifest Dragonmarks.
Mechanically, eladrin gain +2 to Intelligence and +2 to either Charisma or Dexterity. They can briefly step through the feywild to teleport a short distance and are resistant to charm. They are also proficient in the longsword regardless of class. Eladrin can see better in low-light conditions.