The factions of The Great Ursee are human polities engaged in a bitter struggle for power across the endless sea, its unimaginable heights and bottomless depths. In fact, the chapters begin when the empress narrowly escapes death, bringing the two superpowers - the Northern Imperium and the Mancer Order - to the brink of war, as the other two factions scramble for cover.
- Northern Imperium, the single largest power bloc - in the Northern Ursee, at least
- The Mancer Order, a technological cult with unknown goals, and very known power and might
- Civilian Freehouses, independent communities navigating the thin ice between the Imperium and the Order
- Freebooter Rebellion, the human dwellers of the depths, banished from the Imperium and with a major grudge