The solar-system of Cosmora, home to Burgeon and Arabus, and their respective moons. The vast Material Plane is home to an uncountable amount of crystal spheres. Each crystal sphere may house a single planet, a solar system, or even entire galaxies. Crystal spheres float in a rainbow-coloured, chaotic, gasseous material known as the Phlogiston. Spacefarers use Phlogiston Rivers to traverse the deep space and visit distant spheres.