An event of war reduced this planet to rubble which evolved into an asteroid belt before the time when the Alvar arrived in the Bloheron system. Astroarcheologists noted that many larger chunks of debris bore traces of ruins of a prior sapient civilization. Puzzlemasters within the technocracy theorized the asteroids could be reassembled. It was an idle hobby for most to survey the asteroids and formulate a working solution. The discovery that the planet in the solution was not solid intrigued the Terraformer's Guild. Partially through the reconstruction, the enemy the Alvar had fled and hid from launched an attack which would sterilze the entire system. They rushed to rebuild Ruathawaul and moved themselves and as many creatures as they could into the hollow interior. Many were unwilling, some were coerced, and many others were psychically manipulated. Few survived the time which became known as Skyfall, but were enough to etch their struggles and sacrifices into history. While the other planets were eventually resettled, gave rise to petty kingdoms which swallowed or destroyed each other, the interior of Ruathawaul remains the only thriving civilization.