The tribes of the Shun Hon have a legend about a darkness that covered the world in the Age of The Riders and that the Great Horde drove it back into the The Wastes and raised the mountains of the Tian Shan to keep it imprisoned and tasked the great dragon Druk to keep watch.
But the Seers of the Great Dragon in Khartum say that Druk has passed and that the darkness is returning.
The Great Khan has not slept in days and the watchtower beacons are lit.