Designated either the Holiest of Holies or Holy of Holies, this was a fragment of debris originating from the original Death Star. Ugor scavengers managed to recover it not long after the Battle of Yavin. The salvaged material contained a gravity well projector prototype. The Ugors' priest-scientists subsequently discovered its capability to organize the disorganized waste prevalent in the Ugors' home, the Paradise system. Following this discovery, they named the projector the Prime Mover, and the wreckage containing it became known as the Holy of Holies or Holiest of Holies.
A defensive perimeter of Black Hole-class Salvage Dreadnoughts, crewed by Ugors, constantly guarded the area around both the wreckage and its sacred component. The Holiest of Holies possessed a mass totaling 40,000 tons. Its appearance was undeniably that of wreckage; visitors were met by a disorganized collection of ruined conduits, structural supports, and corridors. The complete destruction of its external surfaces made identifying its origin as the Death Star difficult.
Within the space station fragment, artificial gravity enabled standard movement. However, the absence of oxygen necessitated the use of breath masks. Visitors often found the shadows and echoes within to be unsettling. Imperial equipment, including stormtrooper armor and blaster rifles, was strewn randomly throughout the passages. Among the intact sections of the wreckage were a waste disposal unit, Darth Vader's private chambers, and his meditation chamber (complete with a spare helmet and cloak). Force-sensitive beings could still sense a lingering malevolence in the area. Obi-Wan Kenobi's lightsaber also remained within the wreckage and could be located. The gravity well projector was situated at the hulk's center, within a lofty chamber featuring shattered transparisteel viewing ports.
The debris was not uninhabited. Notably, a contingent of malfunctioning automatons, referred to as Void Droids, wandered throughout the wreckage. Driven by a need for power cells and replacement components, they would attack anyone entering the sacred site. Furthermore, a sick and wounded dianoga dwelled within the remains of a trash compactor.
When the Alliance to Restore the Republic eventually discovered the wreckage and seized the gravity well projector, the Paradise system reverted to its former state of disarray.