Sildeyuir

Sildeyuir was once a demiplane connecting to Aglarond's Yuirwood. The eladrin of Yuireshanyaar (sometimes referred to as star elves) created it to escape human intrusions into their realm.

Sildeyuir is located at the same place in the Feywild as the Yuirwood in the material world. Because the Yuirwood is rife with Spellplague, though, few if any portals allow passage between the two. Even so, the Sildeyuir fey do open portals into the Yuirwood from time to time.