Xamus / Sumax Xamus / Sumax was a two - headed , four - armed sentient who was imprisoned on M ' Bardi during the Clone Wars . He was possessed of two distinct personalities , one for each of his heads : one head was a peaceful , gentle being , and the other violent and angry . Though they were not unaccustomed to working together , the heads — each of whom controlled one pair of their body ' s arms — had vastly different attitudes and views on life . Eventually , Xamus / Sumax ended up in M ' Bardi Prison , on the water planet M ' Bardi in the Outer Rim . During the Clone Wars , the Separatist commander Durge started a mass brawl and riot in the prison , which caused damage to the building and allowed water to enter it . Xamus / Sumax was involved in the rioting , though he soon came up against a pair of Jedi Masters , Kit Fisto and Plo Koon , dispatched to M ' Bardi to put a stop to the riot . After being incapacitated by Fisto , both of the heads worked together to stop Durge from killing the Jedi , in the interest of their own preservation . Fisto and Koon allowed Xamus / Sumax to follow them onto the higher level of the prison , and after another clash with Durge , Fisto allowed him to tag along with the Jedi and watch their back , for which Xamus / Sumax would be rewarded with freedom . Biography . Imprisonment on M ' Bardi . Xamus / Sumax was a member of a six - eyed , two - headed , four - armed species with two distinct personalities , both male ; one was peaceful and gentle , the other violent and angry . Each personality was embodied by one of the heads , which each controlled two of Xamus / Sumax ' s four arms — the peaceful head controlled the lower pair of arms , while the other head controlled the upper , more muscular pair . Each of his heads had three eyes situated in a triangular position , with one above the other two . At some point in his life , the upper left arm was severed and replaced by a simple cybernetic arm , similar in appearance to Xamus / Sumax ' s biological arms , with three large fingers . The aggressive head ' s left eye was badly scarred , while he also was missing a number of his teeth . The two shared the same vital organs , so one could not die without taking the other with him to the grave . The aggressive head often got the other head in trouble , committing illegal acts that the peaceful personality could not prevent . Eventually , Xamus / Sumax was sent to M ' Bardi Prison on the planet M ' Bardi in the Outer Rim Territories . Built underwater on a coral - covered seabed , it was full of ruffians and criminals of various backgrounds and species , and although there was not much in the way of actual security , escaping the prison was not an easy task , as it was surrounded by vast seas . Both of Xamus / Sumax ' s personalities longed to escape . Encounter with the Jedi . At some point during the Clone Wars , the bounty hunter Durge , working on behalf of the Confederacy of Independent Systems , incited a large scale riot at M ' Bardi prison . Durge hoped to lure members of the Jedi Order to the riot and ambush them . Before long , the riot had gripped the entire prison ; parts of it went up in flames , hundreds of prisoners clashed with each other , and cracks in the walls began to appear throughout the building , allowing water into it , until most floors were covered with a layer of water that reached most beings ' feet . Xamus / Sumax was involved in the rioting , finding two blaster pistols , which the aggressive head held in each of his hands , but before long , the Jedi arrived , as Durge had anticipated . Jedi Masters Kit Fisto and Plo Koon were able to disperse the rioting near the prison ' s entrance , though their appearance prompted the rioters to work together and gang up on them . Meanwhile , Xamus / Sumax , led by his violent personality , killed or incapacitated a slew of his fellow prisoners , until he was left alone in a clearing which contained a shallow layer of water . Eventually , having disposed of all the prisoners in their path , the two Jedi Masters came upon Xamus / Sumax in the clearing . One of the Jedi ordered him to drop his weapon ; the peaceful personality implored the other head to do as told , but the other head refused . He fired at Plo Koon , twice , but each time the Jedi Master blocked the blaster bolts with his lightsaber , before slashing the two weapons from Xamus / Sumax ' s hands . Koon then Force pushed him backwards and prepared to kill Xamus / Sumax , but his comrade intervened , knowing that if Koon killed his attacker the peaceful head would also perish . Unexpected allies . Instead , Fisto knocked Xamus / Sumax unconscious . He didn ' t stay down for long , though , and awoke to discover that the two Jedi were battling with the heavily - armed Durge . The bounty hunter ' s natural Gen ' Dai regenerative abilities made him an almost invincible opponent , so both the aggressive and the peaceful personalities of Xamus / Sumax figured that if they helped the Jedi , they could be granted amnesty and escape M ' Bardi ; Durge was more likely to let them all drown , as the damage he had caused to the underwater structure with his missiles was letting water in at a very fast rate . Xamus / Sumax , his two halves working together , found a blaster rifle , and secured a vantage point from which he could fire upon Durge , who was pinning the Jedi to either wall on each side of him . Xamus / Sumax ' s shot took Durge by surprise , and he lost his grip on the Jedi , falling over . In the process , he inadvertently fired two missiles at the ceiling , making it fall in , gallons of water with it . With Durge seemingly defeated , Xamus / Sumax informed Fisto and Koon that he merely wanted to escape M ' Bardi prison alive . The Jedi realized that the hole in the ceiling Durge had unwittingly created could be used for them to reach the upper levels ; they still had three hundred prisoners to recapture . The Jedi used grappling spikes to ascend to the upper level , helping Xamus / Sumax up with them . As the two - headed convict reached it , however , Durge used his mutable natural appendages to grab hold of his two heads , attempting to pull Xamus / Sumax back down . The quick - thinking Kit Fisto was able to sever the appendages , rescuing Xamus / Sumax . They then used the Force to push a boulder atop the hole , trapping Durge below . With their enemy defeated , at least temporarily , Koon and Fisto agreed to allow Xamus / Sumax to travel around the prison with them to watch their backs . Fisto suggested Xamus / Sumax then be allowed leave the prison for his efforts . Personality and traits . Xamus / Sumax ' s right head had cropped , black hair , and a gentle , peaceful personality . He did not partake in violence , seeking to avoid confrontation , and his two arms were far thinner than the two controlled by the left head . When the Jedi at M ' Bardi ordered Xamus / Sumax to drop his weapons , the right head requested that his peer do as they told , and he tried to surrender to the Jedi . However , he was not above taking up arms when his life depended on it , and he worked in conjunction with his other head to fire a blaster rifle at Durge . Because of the actions of his other personality , the right head was sometimes thought to be have a similar disposition ; upon seeing Xamus / Sumax in the prison , Plo Koon declared him a monster , and would have killed the gentle personality had Koon ' s fellow Jedi not intervened . The left head was the antithesis of the right . Confrontational and argumentative , he had a scarred , pockmarked face , with sleek , long hair . He was confident in his own strength , opting to take on two senior and powerful Jedi Masters at M ' Bardi prison , but he later showed another side by saving the Jedi along with his other half and subsequently turning on his fellow inmates , even if only to save his own skin . His actions caused Plo Koon to question his black - and - white view on life , which saw everyone as either a villain or a hero ; the left head showed that one could be both . Behind the scenes . The character of Xamus / Sumax was created by Haden Blackman for " Means and Ends " , a short comic collected in " " in 2006 . He was illustrated by Rick Lacy and Dan Jackson , but appeared without a name in the comic . " The Complete Star Wars Encyclopedia " , published in 2008 , gave him a short entry in its third volume , and provided his name .