During the unification wars the two alicorn sisters was aided by a duke named Paul Atreides to unite the three pony tribes, but nearing the end of the war the dukedom suddenly vanished and it's abandoned lands are now part of the Everfree forest.

More than a thousand years later the great House Atreides reappeared in their as if nothing happened. And on great timing as the nations of Equus are on the brink of war.