The Celestial Continent is the largest area of land in Underworld. It is divided up into three mainland countries, and one offshore country that is included.

The Southern-most country is Mu'Spell, Land of Fire. It is mostly desert, and where desert ends, so does Mu'Spell's land. This is where the only dock on the Continent is. The Mu'Spell are out-going species, and do not have any prejudices against outlanders, except that they are usually percieved as weaker. The species that make there home in Mu'Spell are the Rilgue, the ancestors of the Disks, the Centaurs, and the Sphynx.

The country in the center of the Continent is Vikelton, Land of Rock. It consists of bogs, swamps, forests, and fields. The species here do not welcome outlanders for the most part. They do not like to have their lives disturbed, and crave normalcy. The species here are the Horn-Hunters, gypsy-like bands that are akin to humans, Minotaurs, and Capricos.

The offshore country is As-Kartel, the Land of Water. It is rocky, and inhospitible in almost everyway. Nothing can be grown here, nothing can be built without it being ripped down by the rough ocean storms, or lightning showers, or it will sink in the sand. The species here do not like outlanders at all. There are the Myrr People, like the Overworld concept, the Conchiglians, who worship the Crab goddess, and the Aguillon.

The last, and Northern-most country is Nie'Fell, Land of Cold. More developed than Wons, Nie'Fell is still highly secretive, and is more likely to send its people out into the world, than to allow the world to come in. They are intellectual and spiritual, craving the higher awareness of more evolved people. They house the largest library in Underworld, but do not contain Overworld pieces, thinking them lewd. It is difficult to enter Nie'Fell, physically. You have to make it past the Horn-Hunters' land in Vikelton to reach the shared borders, and then you have to make it through the Fog Jungles of the Dioscuri and the grottoes of the Vann Bar. Then you've made it to the civilization of Nie'Fell, populated by the Vann Bar and the Zubeurteilen.