Nightmares of the Last War
“Eberron” is also the name for the land of the world, and is also referred to as the Dragon Between. Siberys, the Dragon Above, is the name given to the planetary rings which surround the planet. Khyber, the Dragon Below, is the name given to the underworld.
According to the most common creation myth, the world was formed when the progenitor wyrms changed their form into what they are now. Siberys and Khyber fought, leading to Siberys’ body being broken into pieces. To stop Khyber, Eberron wrapped around him, and Siberys’ broken body became a ring around them both. Siberys created the dragons, Eberron created humanoids and other “lower races”, and Khyber created the “demons” of the world.
Eberron is orbited by twelve moons which give their names to the months of the year.
There are also thirteen planes of existence that “orbit” Eberron, though not as obviously as the moons. Their influence on the prime material plane waxes and wanes throughout the months and years, enhancing or reducing their aspects in certain locations.
Eberron contains seven main landmasses;