Gen ' Dai The Gen ' Dai were a seemingly immortal , formless species which originated on an unidentified planet in the galaxy . Devoid of any bones , the Gen ' Dai typically wore heavy armor to give themselves a humanoid structure . Biology and appearance . A boneless species ( with large fangs ) , the Gen ' Dai were virtually a formless jumble of corded muscle and nerve bundles . Because of this , Gen ' Dai typically inhabited heavy armor made for humanoids to give themselves a form which passed for any number of species in the galaxy . The only distinct feature of the Gen ' Dai were their heads ; typically bald , the Gen ' Dai faces were humanoid with two eyes , a nose , and a mouth full of razor - sharp teeth . Two large , wing - like ears protruded from the sides of their heads ; Gen ' Dai typically tucked their ears under their jaw - line when wearing helmets to hide any distinguishing features . Lacking the vulnerable vital organs of most species , including hearts , and lungs , Gen ' Dai could take extreme injuries and even complete dismemberment , and survive which gave them the reputation of being immortal . In fact , they could regrow lost limbs or other body parts in only a few minutes . Unlike most species , Gen ' Dai had a nervous system which was distributed throughout the body in the form of millions of nerve clusters . This fact gave the species near instantaneous reflexes as well as the ability to sustain a high volume of injuries without any overall damage . So high was their sensory acuity , that the Gen ' Dai were able to feel a Human ' s heartbeat from ranges of up to 200 meters . As the Gen ' Dai did not possess a heart , their circulatory system functioned by way of a series of capillaries and muscular contractions which pushed blood through the body . If the Gen ' Dai received a cut , that area could easily be cut off from heavy blood - flow to prevent bleeding to death while the body regenerated itself . One of the Gen ' Dai ' s few weaknesses was that they could be forced into an extended period of hibernation if they took too many severe injuries across their entire form . During this time the Gen ' Dai ' s regenerative abilities replaced the body mass which was lost . Ultimately the only way a Gen ' Dai could be permanently killed was if their bodies were fully and completely vaporized or incinerated on an atomic level , such was case with Durge when he was sent into a star . It should be noted , however , that the Gen ' Dai ' s advanced control over their bodies did not extend to healing their brains . Overtime , the brain degenerated like most species which caused a form of psychosis to develop in Gen ' Dai of advanced age . History . The peaceful Gen ' Dai homeworld was discovered sometime after the Great Hyperspace War by the Sith Empire . The Gen ' Dai species was decimated in the ensuing battle , with an unknown number escaping the planet before it was lost to history . Leaving their world behind , the remaining Gen ' Dai were scattered to the stars , seeking out a nomadic existence from planet to planet . Over the course of galactic history , the Gen ' Dai were largely absent from many of the great wars which plagued the established central government , only appearing time to time as the leaders of crime syndicates or bounty hunters . These individuals typically suffered from psychosis stemming from the degeneration of brain tissue due to advanced age . Society and culture . A peaceful species , the Gen ' Dai practiced a philosophy of " perfection of permanence " , a belief that all change is an illusion . Because of this , the Gen ' Dai philosophers preached that taking an active role in anything was pointless and detrimental . Having no official government or organization structure following the destruction of their homeworld , the Gen ' Dai embraced the spirit of nomadic living and journeyed the stars largely in isolation . As their lifespans were so long , ranging from 4 , 000 years to over 7 , 000 , Gen ' Dai rarely reproduced and had an exceptionally low birth rate . While the population as a whole was made up of philosophers , the older population suffered from mental deterioration which led to a pronounced increase in violent tendencies . These rogues tended to take jobs as mercenaries and bounty hunters , poorly representing the species as cruel , heartless savages . Gen ' Dai in the galaxy . Rarely seen in the galaxy due to their low numbers , those few Gen ' Dai encountered generally masked themselves in full armor to not only give them form , but also to blend in as a nondescript humanoid . Those who knew about the species thought of them as long - lived and hard to kill , and also wrongly associated them with vicious killers . This erroneous generalization stemmed from the fact that the most famous Gen ' Dai in the galaxy had succumbed to an age - related psychosis which brought out violent tendencies . Active during the events of the Cold War , two other Gen ' Dai were recorded by the galactic history : the leader of the Nar Shaddaa anti - Imperial resistance the Flame and the Locust , a thug present on Taris during its reconstruction by the Galactic Republic . Arguably history ' s best known Gen ' Dai was the bounty hunter and Confederacy of Independent Systems commander , Durge . Active during the Clone Wars between the Confederacy and the Republic , Durge was completely insane by the time of the war and possessed an unequivocal blood lust . Durge was responsible for the slaughter of Gungan colonists on the moon Ohma - D ' un and the deaths of several members of the Jedi Order , such as Jedi Masters Glaive and Jon Antilles .