"Entry #6305: Progress. I have a lightsaber. The Ithorians stole a nice-looking specimen from the Jedi storehouse, and I have taken it from them. The Jedi are truly a superstitious lot. The weapon is sealed in a special resin and labeled as some kind of evil artifact, dangerous to those using the Force."
JediapprenticeExar Kun's original lightsaber consisted of a metallic hilt that finished in a single blade emitter shroud and fastened neatly to clips on his right thigh. The intensity of[10] the blue-white beam of plasma[2] that it produced was adjustable; at its highest setting, the lightsaber was able to rend Mandalorian iron, a unique ore highly prized for its lightsaber-resistant qualities.[10] Minor modifications were made to include three additional emitter shrouds and a ring at the base to facilitate a belt clip.[11]
A schematic of Kun's redesigned lightsaber
In 3,996 BBY,[12] Kun's lightsaber underwent extensive alterations, the most significant of them being the incorporation of a second emitter assembly that was identical to the one already installed. A single power cell activated both ends of the newly-created saberstaff—together or independent of one another—which was recharged by a hidden socket situated just below the ubiquitous black handgrip. Dual focusing cores complete with lens crystal assemblies were crossed by a pair of power conduits that wired into a single red activation stud at either end of the hilt.[2] Three smaller, colored, and vertically-aligned buttons[1] were on the black surface of the protruding emitter assemblies, which were protected by four symmetrically-placed, pronged emitter shrouds. Included were paneled controls that adjusted the blade length between 0.5 and 1.5 meters, as well as diagnostic systems. Opposite the octagonal dual-phase control was an identically-shaped mechanism that adjusted the intensity of the lightsaber's twin blades, which, at their lowest setting, served little more purpose than a glowrod, neither able to inflict damage nor resist opposing weapons in combat. At full power, the lightsaber resisted the blades of others and cleaved through virtually anything else with which it came into contact,[2] including weapons empowered by the Force.[3][5]
"Time to make this more interesting. Do you like the modifications I made to my lightsaber, Master?"
―Exar Kun reveals the second blade of his lightsaber[src]
Extendable belt clips jutted from the base of each emitter shroud and allowed the lightsaber's handler to conveniently affix the device to their person from either end.[2] Following his embrace of the dark side of the Force, Kun's weapon was infused with the negative energies of its creator,[6] and those who faced him were unsettled by its insidious nature.[2] Inheritors of the weapon who were sensitive to the Force found themselves infected with the lightsaber's residual malevolent power, while those with no such affinity remained unaffected.[6]
The efficiency of Kun's preferred combat style of Form VI: Niman[4] was further complemented by his saberstaff's improvements. In an era when such weapons were all but forgotten,[1] the double-bladed nature of Kun's lightsaber bewildered enemy combatants. A single ignited end often preceded the opposite and served to offset the opposition when finally activated in the heat of battle.[5] Offensive attacks were blocked by one blade as the hand grip was quickly spun to deliver a killing blow with the other. Swift adjustments of either blade's length or intensity caused enemies to overextend themselves and allowed the Dark Lord of the Sith to counterattack with lethality.[2] Combined with his incredible mastery of the Force, Kun was a nearly unbeatable warrior when also armed with his double-bladed lightsaber.[2]
"By the Force! I thought a lightsaber could cut through anything. The walls are barely scratched. The only thing that can resist a lightsaber is…Mandalorian iron!"
As a Jedi trainee, Exar Kun created a single, blue-bladed lightsaber during his years of training under the legendary Jedi MasterVodo-Siosk Baas, a KrevaakiJedi scholar and reputed connoisseur of lightsaber construction. With his original saber, Kun surpassed fellow apprentices Crado and Sylvar; he also faced Baas with his own weapon and that of Crado's, a practice bout that resulted in Baas' defeat and the splintering of his Force-imbued quarterstaff.[3] Later, while he defiantly pursued knowledge deemed forbidden by his Master, Exar Kun ventured to the tomb of a long-dead Sith sorcerer and tested his weapon against the strength of its walls, specially wrought of lightsaber-resistant Mandalorianiron. Initially unsuccessful, the blade's highest intensity was ultimately required to penetrate the unyielding structure. Kun's lightsaber was also the bane of two Sith cultists who tried to waylay the errant Jedi upon his return from the tomb, to their cost.[10]
As he grew stronger in Sith lore and power and became a Dark Jedi, Kun was relieved of his lightsaber on several occasions by the spirit of Freedon Nadd—the same Sith sorcerer whose tomb Kun had desecrated with difficulty—only to have it returned when he completely surrendered himself to the dark side.[13] The lightsaber itself became infused with dark side energy[6] as Kun relied more on Sith power. Over time, he was no longer able to sustain himself or utilize his weapon through any other means, having forsaken the light side of the Force.[14] As he sought to consolidate his power in a bid for galactic Sith supremacy, Kun, who by then had begun to consider himself the greatest living swordsman in the galaxy,[13] wielded his weapon against another Jedi of similarly recognized skill, Ulic Qel-Droma, in a duel that ultimately ended without decision, as both chose instead to join forces as Sith Lords and wage the Great Sith War against the Galactic Republic.[15]
As the newly-christened Dark Lord of the Sith, Kun continued to use his single and blue-bladed lightsaber—despite a traditional Sith preference for bloodshine blades[1]—sometimes alongside another of similar design, left to swing freely from his belt when not in service.[16] He increased his own dark side knowledge through study of a variety of resources, including an ancient Sith holocron with instructions for the creation of an especially exotic lightsaber: one that produced a blade from either end of the hilt.[1] The improved lightsaber was soon afterward wielded in combat against Kun's former Master, Vodo-Siosk Baas, who was slain in the Grand Chamber of the Galactic Republic Senate Hall upon revelation of the double-bladed nature of the Dark Lord's weapon.[5] When the Brotherhood of the Sithattacked the Jedi worldOssus, Kun's lightsaber saw further action in a duel with the Great Jedi Library's aged Keeper of Antiquities, Ood Bnar.[17] Kun was forced to abandon his body at the end of the war,[18] and for a time, his lightsaber was thought lost in the conflagration.[6]
"And you will have this. Something I picked up to match your fighting style. Something from a great warrior…"
―Demagol bestows upon Jarael the lightsaber of Exar Kun[src]
Several decades after the demise of Exar Kun, the recovery of his lightsaber became an issue of great importance for the Jedi Covenant, a secret subsect of the Jedi Order dedicated to preventing the spread of Sith influence of any kind. After its discovery by Covenant ShadowCeleste Morne, Kun's lightsaber was quarantined on the planet Odryn in the Sanctum of the Exalted, a storehouse of Sith artifacts considered extremely dangerous by the Order. The weapon was encased in protective nullification resin to stifle its residual dark side influence, complete with a microtag that warned of the danger posed by removal from said protection.[6] In 3,963 BBY, the Ithorianbounty hunting siblings known as the Moomo Brothers infiltrated the Sanctum of the Exalted and stole a number of Sith artifacts, including Kun's lightsaber.[7]
Exar Kun's lightsaber, in the hands of Jarael
The Dark Lord's weapon was taken from the Moomo Brothers soon afterward by the Mandalorian scientistDemagol, who successfully removed it from containment for examination and immediately noticed an amplification of his own persuasive Force abilities.[7] He in turn gave it to a former student of his, an Arkanian Offshoot named Jarael, to complement her particular fighting style. Although she was not sensitive to the Force, Jarael handled the lightsaber with deadly accuracy.[19] With it she attacked Demagol's daughter, her longtime enemy Chantique,[6] who ultimately acquired it and experienced an immediate surge in her ability to manipulate the Force. Also armed with the confiscated lightsaber of former Jedi Zayne Carrick, Chantique attempted to avenge herself against Demagol with the two weapons, only to inadvertently and fatally impale both herself and her father with the saberstaff. With their deaths, Kun's double-bladed lightsaber was returned by Carrick to the Jedi Council for safekeeping.[8]
"A saber-staff! The weapon of Exar Kun! Did he construct that?" "The prototype was two lightsabers he had welded pommel-to-pommel in imitation of the Iridonian zhaboka. I furnished the knowledge that allowed him to improve on the original design and construct the one he is using." "It strikes me as unnecessary, but I won't deny his mastery of the Jar'Kai technique. Niman and teräs käsi will never substitute for dun möch, but I appreciate that you have trained him to be a fighting machine rather than a true apprentice."
―Darth Plagueis and Darth Sidious, discussing Maul's lightsaber design[src]
Exar Kun's double-bladed lightsaber reintroduced the unique weapon as a design option to duelists in the galaxy at large. While recognized as a development of the ancient Sith,[1] double-bladed lightsabers became prevalent among Jedi in subsequent years and saw widespread use during the Jedi Civil War[20] despite its deliberately offensive design.[1] The double-bladed lightsaber also remained very popular among the factions of Sith that succeeded Kun's Brotherhood. As the first in a considerable period of time to use one in combat, Kun was erroneously credited with the saberstaff's design conception, an impression that was corrected in a historical compilation prepared by Jedi historian Tionne Solusar, from information found in the Tedryn Holocron.[1]
One of many original concepts created by Tom Veitch[21] and visual depictions rendered by Christian Gossett for the Tales of the Jedicomic book series,[22] Exar Kun's lightsaber initially appeared in its single-bladed form alongside its owner in the first four issues of Dark Lords of the Sith, and it was penciled by Gossett without any intricate detail. The lightsaber appeared in the final issue of the series, Jedi Assault, wherein Art Wetherell drew all depicted lightsabers with a similar appearance to one another. Dario Carrasco, Jr. was the artist for The Sith War, the next Tales of a Jedi comic series in which Kun appeared with his lightsaber, which was shown worn unconventionally from his belt. The device maintained its single-bladed exclusivity for the first two issues of the story arc, but the saberstaff variant was revealed in the third, titled The Trial of Ulic Qel-Droma. The lightsaber's final Tales of the Jedi appearance was in the fifth issue of The Sith War, Brother Against Brother.