Ysanna The Ysanna were a race of Force - sensitives who lived on Ossus . Descended from the survivors of the cataclysmic supernova caused by the destruction of the Cron Cluster during the Great Sith War , many of the Ysanna ' s ancestors were members of the Jedi Order studying at the Great Jedi Library . Because of their ancestors ' heritage and genetic make - up , the Ysanna as a people were Forceful and held many Jedi philosophies as their own . While primitive by galactic standards , the tribal people were fiercely loyal and protected the ruins of the Great Library , despite never venturing inside . History . Born from the survivors of the Cron Supernova ' s effect on Ossus - a devastated planet with a caustic atmosphere full of electrical storms and the danger of fierce predators , the Ysanna survived through sheer mettle and the luck bestowed to them by their Jedi bloodline . They eked out a simple existence as hunters and gatherers , while remaining aware of the ancient task bestowed upon them by their ancestors - to protect the secrets of the Jedi . Rejoining the galaxy . Shortly after the return of Emperor Palpatine in 10 ABY , Luke Skywalker and Kam Solusar arrived on Ossus in search of ancient Jedi artifacts . They soon came upon the Ysanna , who attempted to kill the two intruders . The fighting between the two groups came to a halt with the arrival of Imperial forces led by Executor Sedriss QL . The Ysanna fought back , defeating most of the Dark trooper s and stormtroopers , leaving Skywalker and Solusar to deal with only Sedriss and another member of the Dark Side Elite . The battle had turned in favor of Skywalker and Solusar , when Sedriss took the young Ysanna Jem hostage and backed against the inert Ood Bnar , a tree - like Neti Jedi Master who had been dormant since the Battle of Ossus . Suddenly coming to life , Bnar attacked Sedriss and killed the Dark Jedi along with himself . Okko , the tribe ' s chief and greatest shaman , allowed Skywalker to take Jem and her brother Rayf to train as Jedi , but was reluctant to introduce the rest of his people to the new Jedi teachings . However , the Ysanna would not remain isolated for much longer , as the Empire now knew of their whereabouts , and confrontation was brewing . Jem died on New Alderaan , Rayf was killed on Onderon , and Okko and two others were later trapped in carbonite by the forces of Palpatine , who was seeking to use the tribe as a means to halt the genetic decay of his last clone . At the same time Skywalker and Solusar explored Ossus , the Dark Jedi Travgen was hiding on the world . He had been present on Ossus since 9 BBY , after escaping the Jedi Purge . Travgen hid from the intruders , and thus escaped their notice . He had already enslaved several Ysanna tribes by this time . The fate of Travgen and his subjects is as yet unknown . After the planet was opened to the general public , the world once again teemed with life . The Ysanna were now the hosts of a great number of archaeologists , historians , and all forms of academicians from all over the galaxy who studied , scrutinized , analyzed and discovered new things about Jedi and Sith history . Society and culture . Their Jedi heritage of knowledge and wisdom lost through generations of hardship and ignorance , the Ysanna degenerated into superstition . Their use of the Force diminished to nothing but simple tricks performed by unintelligible wizards , known to them as Ysanna magic . Their superstition built upon the remaining Jedi and Sith artifacts left on the world from its speedy evacuation . The Ysanna wizards used various Sith masks in battle to intimidate their enemies , and when protecting the Jedi ruins from trespassers , graverobbers , tomb raiders , or anybody that would walk on their sacred ground . They had a polytheistic religion . Despite their drastically lessened knowledge of the Force , the Ysanna managed to preserve some Force techniques that were lost to the Jedi Order over the millennia , including the ability to form Force ghost s . They also perfected other technique . Unique use of weapons . Armed with unique Concussion bow slugthrowers , the Ysanna tribespeople perfected a technique of guiding a bullet ' s trajectory in midair . This made the Ysanna incredible marksmen , capable of firing at a target , then " guiding " the bullet to hit the target as it moved . While not a particularly taxing ability , as Ysanna were seen plenty of times firing whole clips out of their rifles while guiding the bullets through the Force , it did however require concentration . A Ysanna that was not imminently being attacked , for instance , could direct and control a multitude of bullets in quick succession , or even multiple bullets at once . The closer the Ysanna was to an enemy however , and the more he had to divert his attention from the bullet , to the attacks of his enemy , the fewer bullets he would be able to control .