Towers of Horizon
The six great Towers of Horizon contain powerful magic devices by which the Archmage can keep a watchful eye on the major cities of the Dragon Empire. Because only wizards of great power can actually use them, each Tower is directly overseen by one of the Superiors of Horizon (it is thought that the Superiors themselves use the towers under the guidance of the Archmage.)
Each tower is directed towards one of the six major cities, although only five are currently operational. The tower directed towards Drakkenhall is unable to penetrate the magical defenses put in place by The Blue. Because of this, the number of Superiors was reduced from six to five.