Rur had used his computer-body to detect if lightsaber carrying people were near his location. In this way he desired to ensnare Jedi and imprison them, in vengeance for the Jedi defeat of his splinter faction, the Order of the Terrible Glare. Soul snares might also be the theoretical basis of the crafting of the Sith pyramidal crystals, constructed over five thousand years later on Yavin 4 by the Sith Lords Naga Sadow and Exar Kun, that were likewise capable of the entrapment of life forces on an even wider scale.