The King in Green
Eladrin are at home in the Feywild, a realm generally not visited by those of this world. Elves and Drow were once the same species as Eladrin, but the race split at some point in ancient history in a cataclysm that made the Feywild harder to access. Eladrin generally have nothing to do with Elves or Drow these days, as the they do not live in the same world. For this reason, Eladrin are generally not a playable race in the King in Green.