While in his own lifetime Freedon Nadd did little to advance the cause of the Sith, his legacy, helped along by his lingering dark side spirit, was nothing less than the revival of the Sith Order and eventually, a second great war between the Jedi and the Sith. One of the keys to the unfolding of this legacy was the fallen Jedi Exar Kun. Exar Kun was intensely ambitious, and much like the renegade Jedi who had become the Sith in the first place, he was convinced that by leaving out the study and manipulation of the dark side, the Jedi were hampering themselves and keeping back from reaching their full potential. Eventually, he abandoned his master and travelled to the tomb of Freedon Nadd on Dxun. He encountered Freedon Nadd’s spirit, which led him first to the Sith tomb-world of Korriban and then to Yavin IV, the site of Naga Sadow’s last refuge. Exar Kun took to the dark side much faster than Freedon Nadd expected, and when he arrived at Yavin IV, he took control of the feral Massassi warriors there, mastered the powers of the various dark side devices that Sadow had left behind, and used them to destroy Freedon Nadd’s spirit. He tracked down a couple whom he knew were potential rivals for mastery of the dark side – Aleema Seto and Ulic Qel-Droma. Exar Kun and Ulic fought one another for some time, until a host of Sith spirits, including the legendary Marka Ragnos, appeared before the two and declared them to be the new Dark Lords of the Sith: Exar Kun would be the master, and Ulic would be the apprentice. They led a fresh campaign against the Old Republic and the Jedi, and convinced Aleema to kill herself while unleashing a terrible explosion that destroyed a Jedi training centre and storehouse of lore on Ossus. Exar Kun looted a number of Jedi treasures from Ossus, and returned to Yavin IV to plan his next move, but Ulic’s surrender ruined his plans for good. A massive Republic fleet with a host of Jedi arrived to destroy him and cleanse the moon of dark side influences, but Exar Kun beat them to the punch by destroying his Massassi in a ritual that transformed him into a dark side spirit. He hid in the Yavin ruins for thousands of years, to be reawakened sometime after the Battle of Endor by Luke Skywalker when the latter founded a school for training Jedi there.