World of Warcraft: The dark secrets of the mogu

They were once rulers of an empire that rivaled the Zandalar in size and scope, but they possessed powers far greater than the trolls could ever dream of. They used their power to shape the grummels and saurok from the lesser races of Pandaria. They enslaved the pandaren race as a whole, using them to build structures and gather supplies all under threat of their iron fists. Their great empires trace back to thousands of years ago, before even the War of the Ancients, and possibly before the rise of the kaldorei race.