The Avenan Empire
Great Deep Ocean
East of the lands of the Ta-Den stretches the Great Deep Ocean. As with the Endless Ocean, no one knows what may lie on the other side of this vast expanse of water. Many Ta-Den explorers have disappeared into the ocean in search of fortune or fame on its far shores; few have returned, and those that have did so empty-handed.
Theories about what may lie out in the Great Deep Ocean run up against both cosmology and varying assumptions about the shape of the world. The currently prevailing theory of the shape of the world, is that it is a convex disc, and that the edges of both the Endless Ocean in the west and the Great Deep Ocean in the east abut the Transitive Planes of Shadow, Ether and Astral. Another popular theory – and the one that continues to be most popular with planar mechanics specialists and summoners – posits that the world is merely the bottom of the interior of a vast, rotating sphere surrounded by the Transitive Planes. Still others believe that the world itself is a sphere with the land, sky and ocean clinging to its exterior, floating through the Astral Plane, and with the planes of Ether and Shadow represented by day and night.