The Empire of Bael Turath was one of the greatest in all of humankind’s history. In the Empire, the noble class (kings, lords, princes, etc.) were completely devoted to the preservation of their power. They were so obsessed with power and glory that they vowed to even give up their humanity for it and began to receive visions. They believed these visions would help keep the Emperor and the nobles in power. The visions spoke of an evil month-long ritual that each ruling house of the Emperor must participate in to secure their power forever. Some of the houses refused to take part in the ritual, as it required all of the participants of all the houses to perform terrible deeds. Those houses which refused were destroyed and the ritual commenced without them. The ritual summoned devils with whom the nobles signed pacts to ensure their reign. These pacts not only bound the human nobles but also their descendants forever, creating the tiefling race.
Bael Turath ultimately fell when it confronted the other major Empire of its time, the dragonborn empire of Arkhosia. The two superpowers warred with each other for decades before simultaneously collapsing under the strain of their struggle and the cost of the final battles of the war.
Ruins of Bael Turath: