Lwhekk / Legends Lwhekk was the capital of the Ssi - ruuvi Imperium and was located beyond the main disk of the galaxy , in the remote Ssi - ruuk Star Cluster . Geography . Lwhekk was a humid , jungle - covered planet located in the Ssi ' kaat system within the remote Ssi - ruuk Star Cluster beyond the known galaxy . The jungles of Lwhekk were broken by spired cities which appeared to be quite fragile against the jungle . The planet also had volcanoes and a large part of it appeared to be covered by oceans . Known locations on Lwhekk included the volcano Mount Skar ' lak , the underground Caves of Ss ' laath and the Cree ' n ' aak Palace which served as the residence of His Potency the Shreeftut , the supreme ruler of the Ssi - rruk . The planet ' s sentient species were the saurian Ssi - ruu k and P ' w ' eck races . Lwhekk was also home to the fft , small multi - legged lizards which were the main source of food of both Ssi - ruuk and P ' w ' eck . Society . The Ssi - ruuvi Imperium had two seats of power ; the Conclave , the religious body , and the Elders ' Council , the political body . The Conclave and the Elders Council often competed for control of the empire and only the leader of the Imperium could prevent civil war from happening . The leader of the Imperium was known as His Potency the Shreeftut and was the supreme ruler of the Ssi - Ruuvi Imperium . The society of the dominant Ssi - ruuk was divided into a rigid caste system based on skin color . Their caste system comprised five main groups : blue , gold , yellow , red and green . The skin of a Ssi - ruuk represented his political standing . One color dominated each Ssi - ruuk ' s body and it was forbidden to mate with a different colored Ssi - ruuk . Blue - scaled Ssi - ruuk were the politicians and leaders of society while gold - scaled individuals served as the religious caste . Yellow - scaled Ssi - ruuk were responsible for the technology used by the Ssi - ruuvi Imperium while red - scaled Ssi - ruuk dominated the Imperium ' s military . Green - scaled Ssi - ruuk formed the work force of Ssi - ruuvi society . Below them were brown hued Ssi - ruuk who were the offspring of two Ssi - Ruuvi from two different castes . These were considered outcasts by Ssi - ruuvi society and performed the most menial of jobs . Last of all were the P ' w ' eck — a related species — which served only as slaves . History . Early history . When the Ssi - ruuk expanded into space , they conquered several worlds and enslaved their inhabitants , most of which were primitives . Eventually the Ssi - Ruuk discovered the art of entechment and began enteching subjugated species . The practice of entechment of lower life forms became common ; even the P ' w ' eck , cousins of the Ssi - ruu were used . But gradually it was learned that containment of these " souls " for long periods would result in madness and it was decided that the Imperium needed to expand its realm once again . Another reason was due the dwindling resources in their isolated region of space . Exploration of the Galaxy . Prior to that , the Imperium had never before dared to expand beyond its cluster , partly because of the large distances involved , partly due to the xenophobic nature of the Ssi - ruuk , and partly because of their religious fear of traveling to ' unconsecrated ' worlds . In 2 BBY , the Ssi - ruuvi ' s supreme ruler — the Shreeftut — received visions through the Force of a hooded Human who revealed himself to be Emperor Palpatine , ruler of the galaxy . He offered the Ssi - ruuvi dozens of worlds and millions of Humans to entech , in exchange for the use of Ssi - ruuvi technology . Thus , they decided to venture into Wild Space , where they conquered the small Human colony of G ' rho , capturing and enteching numerous members of the populace . Due to their secret agreement with the Ssi - ruuk , the Imperial leadership covered up the incident and blamed the Alliance to Restore the Republic for the attack . Among their captives was a Human boy named Dev Sibwarra , whom the Elder Bluescale brainwashed through mind manipulation techniques ; what astounded them was the boy possessed strange powers to sense others . It was from this boy that Ssi - ruuk Admiral Ivpikkis discovered that Humans were the galaxy ' s dominant species . He also discovered that humanoids had longer containment time when enteched and could last longer than most other species . Due to Sibwarra ' s Force abilities and his ability to communicate with his fellow Humans , the Ssi - ruuk used Dev Sibwarra to calm the subjects being enteched . However in 4 ABY , Emperor Palpatine was killed during the Battle of Endor onboard the Second Death Star . With the Emperor unable to fulfill his promise , the Ssi - ruuvi launched an invasion of the edge of the known Galaxy . Expeditionary forces were sent out against both the galaxy proper and the neighboring government in the Unknown Regions , the Chiss Ascendancy . However , neither expedition was very successful : the Ssi - ruuvi only narrowly succeeded in conquering the Human world of Cattamascar , and were utterly defeated at Bakura . Likewise , although several minor Chiss worlds were taken , the Chiss retaliation was massive and unexpected , and laid waste to Lwhekk . After the Chiss raid on the Imperium , a small Rebel Alliance task force appeared in Ssi - ruuvi Space . The Rebel force had come to stop the Imperium ' s expansion into the known galaxy . Seeing the Imperium in ruins , the Rebel Alliance believed that the threat from the Ssi - ruuk was over . Resurgence and Defeat . It was many years until the Ssi - ruuvi rebuilt enough to contemplate continuing their expansion . Two major events occurred in that time . One was the birth of the Keeramak , an event of major significance in the Ssi - ruuvi religion . The Keeramak himself , a mutant Ssi - ruu , was a master strategist and politician . The other event was the secret takeover of the Imperium by the Yuuzhan Vong , who secretly placed and made one of their own , E ' thinaa , a ranking general . During these years , the Ssi - ruuk would discover new techniques of preserving enteched souls . Together , E ' thinaa and the Keeramak devised a new strategy for continuing the invasion . They made a secret deal with the Prime Minister of Bakura , Molierre Cundertol , and engineered a faux P ' w ' eck slave uprising , positing the Keeramak as its leader . Together , they succeeded in consecrating Bakura and launching a second invasion of the planet , but when the P ' w ' eck ' s actually did revolt and managed to kill the Keeramak , all was lost . Cundertol himself fled back to Lwhekk , where E ' thinaa killed him . The subsequent fate of the Ssi - ruuvi is unknown , although it was believed that the Yuuzhan Vong empire launched an actual invasion of their territory . By doing this they put down the Ssi - ruuvi Imperium of the Ssi - ruuk Star Cluster and began a brief new reign of terror within the Sector of the Unknown Regions . In any event , it is likely that the Imperium was too weakened to continue its invasion plans for the foreseeable future .