Sphere of Fire

The Sphere of Fire is the bottommost sphere. It sits as the furthest sphere from the Material and the least hospitable to mortal life without significant protection. To travel here one needs the ability to breath fire as there is no oxygen on this sphere. 

A sea of fire for as far as the eye can see with great stalactites of obsidian breaching down from the sphere of earth hanging above it. Beneath the sea of fire there is a sea of molten iron upon upon which giant motes of elemental earth float, thrusting up above the fire in drifting rock formations. Great citadels of iron rise from the fire sea as well, homes to Azer who have learned to manipulate the molten iron.