Lord Nyax The legend of Lord Nyax was a part of the mythology of Corellia . A scary bedtime story was told to Corellian children that Lord Nyax came to steal young boys and girls from their beds . Later in history , the folk tale of Lord Nyax was merged with Darth Vader ' s covert missions to kidnap Force - sensitive younglings , and spread from Corellia over the wider galactic community . Throughout history , other beings had their identity assimilated to that of the evil spirit . At the time of the Galactic Civil War , a Corellian sect known as the Cult of Lord Nyax carried out horrendous acts of terrorism against the local population in the name of their deity . During the Yuuzhan Vong invasion , the Dark Side Adept Irek Ismaren assumed the identity of Lord Nyax after hearing it in the minds of those he tortured . History . In times that were considered ancient by 27 ABY , the evil spirit known as Lord Nyax was referred to by Corellian parents to frighten children into compliant behavior . Adults typically used phrases such as " If you keep on being a bad boy , Lord Nyax will come for you . " He was described either as a monstrous pale ghost or as a man shrouded in a dark cloak , with sickly yellow eyes , a hooked nose , sharp teeth and long nails . The latter depiction shared many similarities with the appearance of the Galactic Emperor Palpatine . and , more generally speaking , with the cosmetic effects of dark side corruption . Shortly after the Clone Wars , the Lord Nyax story became associated with Darth Vader , who also appeared , seemingly at random , to steal and kill Force - sensitive children in the dead of night before they could grow to become Jedi and a threat to the New Order . Following this assimilation , the Lord Nyax legend spread from Corellia all over the galaxy during the early years of the New Order . At the time of the Galactic Civil War , several Corellian organizations honored Lord Nyax as their elected deity . By 1 ABY , a group called the Cult of Lord Nyax had formed , that worshiped Nyax . The cultists donned dark cloaks and caused a number of terrorist attacks in his name . Their leader himself took up the name Lord Nyax , but was eventually killed by a spacer . The Followers of Nyax , another organization , also adored the evil ghost and promoted radical anti - Jediism . When Darth Vader traveled to Corellia to hunt down remaining Jedi , the Followers saw him as the reincarnation of their god . In 27 ABY , the mentally - damaged Dark Jedi - in - training Irek Ismaren assumed the name Lord Nyax , after reading it in the minds of his frightened victims . He understood this as a recognition of his status , as " Nyax " sounded unique , and " Lord " meant that he was more important than everything else . Under this new identity , Ismaren brought terror to the citizens of Coruscant , capital world of the New Republic , after it fell to the control of the Yuuzhan Vong , a species of extra - galactic invaders . The fake Nyax was apparently crushed to death by a combination of rocks and boulders from the Jedi Temple ruins , though later reports hinted that he may in fact have survived . Behind the scenes . Lord Nyax was first mentioned in " " , a 2002 novel written by Aaron Allston . In November 2003 , the Cult of Lord Nyax appeared in the first expansion of the " Star Wars " - themed " Star Wars Galaxies " . As Lord Nyax was a mythological character , he did not appear in " Galaxies " . Nonetheless , the cult did have an imposter who went by the name Lord Nyax . As a menacing figure towards children , Lord Nyax shares many similarities with the real - life legend of the , a type of make - believe figure that is sometimes used by parents to frighten their offspring into swift obedience .