Known Spheres

The Known Spheres are a a collection of crystal spheres in the Phlogiston of the Astral Sea.
Formally, the Known Spheres refers to the section of the Phlogiston that contains Realmspace, Greyspace, and Krynnspace, which make up the center of the wider spelljamming community. Also included in the Known Spheres are Herospace, Greatspace, Darkspace, Faeriespace, and Clusterspace.
Informally, the Known Spheres are used to refer to "the known universe," that is all of the crystal spheres charted, mapped, and regularly explored by spelljamming vessels.

Location under

Astral Sea

Included Locations

• Rapide Frontier

Inhabiting Species

• Mercane