Within the vast Dark Void, the void-blank space between Starfields was almost as massive as the Starfields occupied spaces, but most of it was simply neglected hazardous areas and debris of abandoned or dead Celestial Bodies. They were the home of treasure hunters and dreamers, but most importantly, they were locations that were difficult to regulate and observe and thus were often used to conduct various businesses.
The Void Hunter Organization led by Venerable Slayingsword, the Reaping Sword, had a base of operations upon a crumbled and desolate flat continental earth that they've essentially colonized using various miraculous formations and techniques. It was habitable and could sustain lives; some Mortals had lived their entire lives on this earth.