Our first crossover book between Spelljammer and Dark Sun, based upon the original Crimson Sphere fanon work by Adam “Night Druid” Miller, who assisted with this expanded remake.

The Crimson Sphere lies far off the known space lanes. It is the home of Athas, the world of Dark Sun. This document details the crystal sphere around the world of Athas. Although there were once well-explored and documented routes to this sphere, they have been long unused. Traders and travelers alike have chosen to forget the sphere, for it is said to be cursed. In over two thousand years, few have journeyed to the Crimson Sphere, and far fewer still have returned. This sourcebook provides an interpretation of how such a sphere could exist, and why Athas has remained a remote and isolated location in the Spelljammer universe.