The Brontax Galaxy was a galaxy of trillions of citizens of The Imperium before it was all swallowed in a supermassive black-hole, created by Indigo Shade in her rebellion against the High Empire. She had taken refuge on the planet Briggan but when the joint task-force of Imperium-High Imperial ships arrived, she created the supermassive black-hole.
The Briggan Star System
Main article: The Briggan Star System
The Briggan Star System was a minor system within the galaxy that was relatively unknown. It was a supergiant red star and a single dwarf planet capable of life due to the planet's proximity to the cool star. This was where Indigo Shade was believed to be when she caused the supergiant star to implode into a supermassive black-hole in an instant[Tales 1].
Shades of an Empire
Reports reached The Imperium and the High Empire that the infamous Indigo Shade had taken residence upon the planet Briggan within Imperium space. As a show of good faith, The Imperium would allow the High Empire through their territory and arrest Indigo Shade. Ameryl Hypericum, aboard The Lamb, chose to accompany the High Imperial Battlecruisers, under the command of Princess Astrid, on their search to the star system. Shortly after arriving in the system, seeing no life forms on the planet, the star imploded and a supermassive black-hole began to engulf the system before it would consume the galaxy. The planet was first to be sucked into oblivion[Tales 1].