Nuck Lyu Nuck Lyu was a male Jedi Master of the early Galactic Republic and Watchman of Esseles . He and his contemporary Jedi Master Sar Agorn had been searching for Force - sensitives in the outlying systems of the Corellian sector when they encountered a youth named Cope Shykrill . Biography . According to Master Agorn , Nuck Lyu had been instructing a group of Jedi on how to use the Force to throw a new weapon of his own creation at wooden targets . During the lesson , Lyu noticed how Cope Shykrill excelled in his lesson by repeatedly hitting the targets with extreme precision . He was quite unnerved at how his own abilities with the bladed weapon took him nearly two months to master , but Cope ' s ability seemed " unnatural . " He then expressed his concerns of Shykrill ' s abnormal abilities to Sar Agorn , who shrugged it off as a testament to Shykrill ' s potent Force attunement . Master Lyu however wasn ' t so sure . Lyu then returned to his post at Esseles , leaving with Master Agorn samples of his new blade . He also gave a stern warning to Agorn , telling him to pay closer attention to Shykrill . Return . Sometime later , Sar Agorn found Cope at a camp fire entertaining a small group of younger trainees with a shadowplay . As he watched , feelings of envy and shame washed over him . Confused , Agorn left the shadowplay for his own chambers to meditate . He was interrupted twenty - three minutes later by screaming - - coming from the camp fire . Agorn rushed back to discover that the other padawans with Shykrill lay dead , and Shykrill himself badly wounded . Sar Agorn was determined to understand what had transpired , so he waited as the weeks went by for Cope ' s wounds to heal , and then beckoned him for a constitutional . He revealed to Cope that he had witnessed part of his shadowplay that night , and that he was unaware of his storytelling capabilities . Agorn then ventured out and asked Shykrill if the shadows he had cast during his shadowplay had " ever spoke to him . " The youth replied that they did , and that it was time for Agorn to join the shadows . But even as Cope Shykrill began to exert his dark will over Sar Argorn , the Jedi Master was saved . From seemingly nowhere , one of Nuck Lyu ' s signature blades flew at the unsuspecting youth , cleaving his head from his body . It was Nuck Lyu himself who ' d hurled the weapon from his hiding spot , having been summoned from Esseles secretly by Master Agorn . Both of them instinctively knew that Shykrill had been responsible for the trainees ' deaths , and that the only way to free him of his evil was to end his life . Talents , Powers & Abilities . According to Sar Agorn , Nuck Lyu was the Jedi Watchman of the planet Esseles . It is unknown if he was the watchman for the entire Darpa sector . He was also an accomplished weaponsmith , having created a unique bladed weapon entirely of his own design . He was an instructor to Jedi initiates in some capacity ; whether exclusively in the form of Force applications or lightsaber combat is unknown . Lyu was proficient with Force throw , especially with his unique weapon , as according to him it " still took me nearly two months to throw it with consistent accuracy . " He seemed also to quite adept at Force sense ( at least more so than Master Agorn ) , as he was able to sense the unnatural ability with which Cope Shykrill handled his unique blade , and the inherent danger the boy presented , while Master Agorn was not . He may have also been skilled with Art of the Small or Force cloak , since he was able to stay hidden from Cope Shykrill as the young man assaulted Sar Agorn . Behind the scenes . The story of Nuck Lyu is recounted by Master Agorn as he talks about his first encounter with what he described as a Dark Jedi . The story appears in " " .