Khyber

The underdark in Eberron is given the name of Khyber, after the mythic Dragon Below. Down in the depths of the earth terrible creatures lay, including ancient malignant evils sealed there since the Age of Demons as well as the terrifying daelkyr and their creations, including mind flayers, beholders, and the like. There are few entrances to Khyber, and most are in hard-to-reach places, but some still venture down into the depths. Khyber is the only place where Khyber dragonshards can be found.

Khyber

Eberron Incursion Xorial Belisarius07