The Plane of Fire is an elemental plane of existence located in the Inner Sphere. It is a charred land of ash with volcanoes that always flow, seas of magma, and great sky fires.
This plane of existence, like the others, was created in the beginning when the Great Bard sang everything into existence. It is intended as a barrier between the mortal Material Plane and the Astral Plane.
When the fourth Ishu ascended, he traveled beyond the stars and found himself in an endless sky where he was met with a boat made of clouds. He made his way through the Plane of Air until he found himself in a colossal ocean. On the surface was a whirlpool which led him to the bottom of the ocean. There he found a giant wall of earth with many dark cave systems but one cave system had crystals that illuminated a path for him. He made his way through until he got to a sea of flames. The great fire tried to consume him but using his newly gained power, he tempered the flame, causing it to retreat. This revealed the charred landscape and burning skies. He crafted a crown from a ring of fire. He then built a grand palace on a burning island in a volcano.