In a time before mortal memory, Eberron played host to a fiendish empire of decadence and grandeur. Their rule reached across multiple continents, but the seat of the Overlords was Fah'lrrg, which lay in the northwest of the land that would one day be known as Khorvaire. Home to the fiends' greatest cities, Fah'lrrg would eventually become their prison.
Tens of thousands of years have passed since the couatls and their dragon cousins rose up against the demons and vanquished the Overlords to eternal chains. Few people in the modern-day lands of Khorvaire know much more of that past than the one fact which has endured through the ages: the Demon Wastes, as it is now known, is a desolate land gripped by evil.