PHLOGISTON

Phlogiston (pronounced: flo-JIS-tun) was a term that could either refer to the space between the CRYSTALSPHERE's of the Prime Material Plane or to the flammable fluid that permeated it, a rainbow-colored chaotic material that surrounded the spheres. Bizarre creatures inhabited it and preyed on anyone or anything traveling between spheres. Spacefarers sometimes called the phlogiston the flow or the Rainbow Ocean.