The Eastern Empire was founded by a group of stranded mercenaries in the years following the Mage Wars. The Empire is a military and magical powerhouse stretching from the eastern borders of Hardorn and Iftel to the Salten Sea. Ruled by the Emperor, the Iron Throne is passed to the Emperor-elect in the final years of an Emperor's reign. Administrations can last upwards of a hundred years, for the Emperor must be a mage of at least Master-class, and as such has access to life-extending magics.
Until the Mage Storms, the Empire was known for their prolific use of magical Portals, a sort of permanent Gate. The Mage Storm effectively eliminated the use of these portals, causing massive chaos throughout the Empire.
This group is culturally similar, and vaguely analogous, to the Roman Empire.