Karzahni ( Disambiguation ) In the LEGO BIONICLE universe , Karzahni is a name applied to multiple things , all of which represent death and suffering : Most Matoran only know of the ruler and his realm through legends ( the plant is unknown for the most part , though the Matoran of Metru Nui know of it through their Turagas ' stories ) . Given the widespread nature of these legends , Karzahni is a common figure in exaggerated " " horror stories . Angry Matoran also occasionally shout at each other to " Go to Karzahni ! " ( a direct reference of a human expression concerning hell , though possibly a little less profane considering how flippantly the Matoran refer to the ruler ) . The Realm . As Karzahni and his realm became myths , they described the land as a nightmarish world ; one shrouded in darkness and even hotter than Metru Nui ' s Great Furnace . This land had no name , but eventually also became known as " Karzahni " . The Matoran that became the Toa Inika recently rediscovered the dark realm during their travels . The land is indeed as dreadful as the legends said ; there are volcanoes that erupt burning ice and waterfalls of dust . In addition , thunder makes no noise , but a breeze of wind can be deafening . The pathways are filled with " statues " of Matoran : lazy Matoran who sat on stones for too long and turned to stone themselves . In the center of the realm is Karzahni ' s palace , once a magnificent home for a ruler , but now a smoldering wreck , and the forges and furnaces used by the Matoran who live there . Karzahni is also the birthplace of the dark Hunter codenamed " Devastator " , who is reputed to have emerged from a fiery crevice in the region . The realm used to be accessible by boat or airship . However the waterways dried up and now it can only be reached through an overland path infested by Manas . Karzahni has long been watched over by a Makuta named Icarax . Despite the fact that the Makuta were once guardians , Icarax never rescued the Matoran ; he felt that workers bad enough to be sent to Karzahni were worthless . With its ruler gone , Icarax sought to conquer Karzahni and establish a power base there . However , the Toa Nuva confronted him ( after evacuating the Matoran ) and , in desperation , Toa Gali unleashed the full extent of her water power , completely destroying the realm . The Plant . When plotting his scheme to take over Metru Nui , Makuta designed an intelligent plant creature to drive the Matoran towards the city ' s center ; he named this creature " Karzahni " after the fabled tyrant . However , the Karzahni was too powerful and too ambitious , so Makuta abandoned it and instead engineered a weaker plant creature , the Morbuzakh . Karzahni swore revenge on Makuta , but this was taken from it when the Toa Metru imprisoned Makuta during the Great Cataclysm . When the Toa Metru were returning to the city , Toa Nokama was critically injured by the Rahi Nui and Karzahni took the opportunity to strike a deal with the Toa : it would cure Nokama if the Toa would get him some energized protodermis . They did so , and Toa Nuju figured out that the Karzahni not only wanted the protodermis to become more powerful , but to save its life ; as Makuta deliberately designs a fatal flaw in all his creations . However , the Karzahni was not destined to be transformed by the protodermis , so it was instead destroyed , leaving nothing but dead wood . Shortly afterward , the Toa Metru used the dead Karzahni branches as part of a boat to bring them to Metru Nui ; but none noticed a single sprig that seemed to have sprouted when immersed in the water . This sprig later grew into a new Karzahni plant , with all the memory and experience of the old . This Karzahni hid for a while , and when the now - free Makuta sought the Vahi Mask of Time , he made a deal with Karzahni and had it impersonate the Morbuzakh in an illusion he crafted for Toa Vakama . But after the illusion had been shattered , Karzahni switched sides and helped Vakama by bolstering his self - confidence , revealing that despite evidence that he and his team had found , they were always the ones destined to be Toa . It also said that it had gotten this information from a member of the Order of Mata Nui ( and implied that it killed the member ) . By this time , Makuta had caught up with the two , and Karzahni was seemingly killed again when Makuta encased it in a shell , cutting it off from heat and light . The Karzahni had full control over its vines and branches and possessed great strength . It could also produce healing sap and fruits at will . It communicated using telepathy and was able to gather information through any of its growth . BIONICLEpedia