Derriphan

Derriphan, from the word for "devourer" and named in reference to the titular , was a    owned by the heretical   priests of  and later by the. A weapon dating back to the  in,  Derriphan was among the oldest relics of the  to persist into the.

Description
Derriphan was a standard, possessed of a purple blade, -length metal hilt measured at roughly 0.6 , and a set of laboratory-grown Ebon crystals. Over the course of its civilization-spanning lifetime, the weapon's artificial Ebon crystals began manifesting signs of decay and could not be repaired due to the loss of the Rakata Forcesaber construction techniques. As a result, the Forcesaber's purple coloration began to take on a deep violet hue on account of this decay, flickering with pulsating energy discharges at irregular intervals along the length of its blade. Its newfound physical similarities to the  creature ultimately earned it its name among its Sith wielders.

Origins
This weapon could be dated to the in,  making it one of the oldest weapons of the  to persist into the modern age. Speculation existed as to the weapon's ultimate origins, with some theorists positing that it was the Forcesaber of a Rakata or warrior who participated in the failed attack on. However, given that the Rakata preferred the use of with blades of a yellow or orange coloration, this weapon likely belonged to a , a member of the Force-sensitive servant caste whose Forcesaber handles were smaller and whose blades were generally purple or blue.

Invasion of Korriban
Though the Sith were successful in driving off the, the Sith king died during the Invasion's final days in defense of his people's sovereignty. His death opened up a power vacuum among the surviving Sith, who fell to infighting in pursuit of uncontested in the. Some heretical caste members, influenced by Rakata culture and sympathetic to their   philosophy, fled the turmoil of the Sith Worlds and traveled to the isolated world of  via a Rakata Force-powered. These priests, the progenitors of the, brought many abandoned artifacts of Rakata origin with them that had been left behind by the invasion forces, among which was a purple-bladed Forcesaber. This weapon became the collective property of these Sith, carried by its members when venturing abroad off Tund.

Subsequent decay
Over the long millennia, the weapon's Ebon crystals began to decay with age. As the art of Forcesaber construction had long since been lost to history with the fall of the Infinite Empire in, the Tundan Sith had no means of replacing the weapon's aging components. Due to its decaying, unpolished crystals, the weapon's purple coloration darkened to a deep violet and flickered with irregular energy discharges along the length of its blade. As its dark purple hue and pulsating appearance brought to mind the known as a, this became its adopted  among its Sith users.