a Jedi student of Vodo-Siosk Baas on Dantooine, Exar Kun used Vodo's holocron to learn about the ancient Sith. Exar Kun didn't like the fact that Vodo, not to mention his fellow students Crado and Sylvar, were not human, and he continually goaded them. He nearly killed Sylvar during a lightsaber training exercise, and she clawed him on the right cheek. Vodo stopped the duel before someone was killed, and challenged Kun to a duel between Kun's skill with a lightsaber and Vodo's skill with a walking stick. Vodo nearly defeated Kun, but Kun snatched another lightsaber and attacked his Master. Vodo's stick was broken, and Kun's rage passed as he felt he was victorious. Exar Kun then left Dantooine to try and obtain the Sith artifacts that had been found on Onderon. He entered the tomb of Freedon Nadd and was controlled by Nadd's evil spirit. Nadd led Kun to Korriban, where Kun discovered a pair of Sith scrolls that tantalizingly led him further down the path to the Dark Side. Kun tried to resist, but Nadd nearly killed him before offering assistance. However, the assistance required Kun to give himself to the Dark Side. Kun chose to live, and was drawn into the Dark Side's power. Then, Nadd directed Kun to go to Yavin 4, where he should complete the work of Naga Sadow. On Yavin 4, Kun again tried to renounce Nadd's teachings, and was captured by the Massassi. They tried to sacrifice Kun in a blood ceremony, during which Nadd's spirit goaded him down the Dark path. Exar Kun called out to the Dark Side in anger, and a Sith amulet was drawn to his power. It fused to his arm, and he was suddenly endowed with the power of the Sith. He took control of the Massassi, and exterminated Nadd's spirit. As the months went by, Exar Kun found Naga Sadow's works and began to gain more and more Sith power. Once he felt that he was powerful enough, he went to the Empress Teta System to defeat Aleema and Satal Keto and claim his position as Sith lord. When he arrived, Keto had already been killed by Ulic Qel-Droma, so Kun tried to defeat him in battle. The ancient Sith masters were drawn to the pair's incredible Dark Side power, and halted the battle. They named Kun the Dark Lord of the Sith, and Qel-Droma his Apprentice. They went into hiding, and continued to gain power. Kun was able to lure several young Jedi Knights to his cause, including Oss Willum and Crado. On Yavin 4, Kun showed them the Sith holocron, which he destroyed in a display of power. The shards exploded outward, piercing the young Jedi and possessing them with Sith demons. When the time was right, they exploded into the galaxy as Sith warriors. Kun ordered his young disciples to exterminate their Jedi Masters in a fiendish pogrom. Thus, the Great Sith War was started. Kun and Qel-Droma's forces killed millions in their rampages. When Qel-Droma was captured and put to trial on Coruscant, Kun and Mandalore arrived to retrieve him. In a show of power, Kun put the entire court into suspended animation, killing the Old Republic's highest official and eventually murdering Master Vodo. Kun later raided Ossus, in an attempt to steal the ancient Jedi and Sith lore stored there. This effort was cut short when Aleema destroyed the Cron System, and Kun was forced to flee back to Yavin 4 to regain his strength. The war would have continued, but the end of the war was quickened when Qel-Droma was captured on Ossus by Master Thon. He was cut off from the Force by Nomi Sunrider, and betrayed Kun by providing the location of Kun's power - the so-called Dark Temple on Yavin 4 - to the Jedi. The Jedi then met Exar Kun on the jungle moon, where Kun drew on the Massassi spirits in an effort to gain strength and make a last stand against the Jedi. Exar Kun was defeated by the Jedi, but only his body was destroyed. Kun consumed the Massassi in an effort to lock his spirit away in the Dark Temple on Yavin 4, where it remained until Luke Skywalker started training his new Jedi Knights there more than 4000 years later. Kun tried to control the emerging Jedi Knights, but his hold was tenuous. His first attempt at controlling one of them led to the death of Gantoris. Kyp Durron was his second attempt, but Kyp used Kun's power in an attempt to destroy the Empire. In a final battle with Luke's Jedi students, Kun was defeated by the combined strength of all the students. At his final death, Kun's former teacher Vodo Siosk-Baas appeared to claim him. Several months later, after escaping from Leonia Tavira and the Jensaarai, Luke Skywalker allowed Corran Horn to destroy Kun's statue and temple with a series of proton torpedoes, utterly wiping out the primary source of dark side energy on the moon.