Visorak The Visorak are an army of spiderlike creatures from LEGO BIONICLE storyline , specifically the latter half of the " Adventures " story arc . The term roughly means " poisonous scourge " in the Visorak ' s language ; and they are also known as " stealers of life " . Description . The Visorak are highly trained and ruthlessly efficient soldiers . All Visorak can generate and fire Rhotuka spinners with the power to paralyze opponents , and each breed also has its own unique spinner power . Their Hordika venom can mutate Toa into half - beasts , with Rahi being mutated severely by it . They can also make spiderwebs , and , in addition to making large networks of webs , they also use this material to encase victims in cocoons ( sometimes laced with the Hordika venom ) . The webs serve as a form of transportation , though they can also communicate through vibrations in the webs . The Visorak were led by the Visorak King , Sidorak , and his Viceroy , Roodaka . These two commanded the hordes in the name of the Brotherhood of Makuta . At one point , the Visorak made up the bulk of a Brotherhood army that included Dark Hunters and Exo - Toa . The mission of the Visorak was to invade and conquer lands , webbing up its inhabitants as they went along . Only a few islands had escaped the Visorak , including Mata Nui ( which nobody knew existed ) , and the Dark Hunters ' base . A few Visorak were also in the vicinity of Mount Valmai during the Great Cataclysm , but when the land broke off and became the island of Voya Nui , those Visorak were stranded and isolate ; as a result , the region never suffered a full invasion . When Sidorak and Roodaka led the hordes to Metru Nui , the Visorak went about conquering the city and capturing the inhabitants as they always did . The Toa Metru returned to the city , but their recklessness led to their capture and they wer injected with the Visorak ' s venom , which mutated them into Toa Hordika . The Toa Hordika were able to escape and later achieve some victories against the hordes , but they only seemed to slow the Visorak ' s takeover . The turning point came when Toa Vakama began to succumb to his feral side that the mutation unleashed . Playing on his frustration with the other Toa , Roodaka offered to make him commander of the hordes , and he accepted . Meanwhile , the other Toa had tracked down Keetongu , a mythical Rahi with the ability to counteract poisons , including the Visorak ' s Hordika venom . Keetongu agreed to aid the Toa in stopping the Visorak and rescuing Vakama . In a climactic showdown , Keetongu went after Sidorak and Roodaka while Toa Matau confronted Vakama . Roodaka had knocked Keetongu down , but refused to help Sidorak finish him off ; without Roodaka ' s help , Sidorak was killed by the beast and Roodaka took over as the Visorak Queen . But Matau had been able to get Vakama to let go of his anger ; Vakama rejoined the Toa in facing Roodaka and gave the hordes the order to disband . As Roodaka had betrayed their king - and because Vakama was officially still their commander - the Visorak quickly dispersed and went their separate ways . Afterwards , some of the Visorak horde was re - formed by the Brotherhood of Makuta , serving as shock troopers in the war between them and the Dark Hunters and as guards for the Brotherhood ' s home island of Destral . The Dark Hunter codenamed " Gladiator " also investigated rumors that Sidorak ' s people were trying to reassemble Visorak armies . To prevent this from happening , the Toa Nuva tracked down a golden Visorak - summoning crystal called the " Heart of the Visorak " and turned it over to the Order of Mata Nui . Enslaved Rahi . The Visorak have been known to tame a few less intelligent Rahi species to aid them in their conquests : Battle Ram . In addition to Rahi , the Visorak also sometimes use mechanical Battle Rams ; mobile siege towers pulled by four Visorak yoked to them . They are equipped with catapults that fire flaming boulders and often have faces mounted on the front to frighten enemies . References . < div class = " references - small " > General information comes from the " BIONICLE Adventures " book series ; see List of BIONICLE media .