Edur Ithindra was an ancient abandoned elven outpost.Tenga the spellcaster lived in the ruins of theoutpost. It lies within the boundaries of the Broddring Empire. It is atop a hill. Eragon stumbles upon it in Brisingr.
After Galbatorix's death, Nasuada sends four spellcasters to search for Tenga. When they hadn't arrived in a long time, Nasuada sent Arya and Firnen to search for them. However, Arya found the bodies of the spellcasters but there was no trace of Tenga.