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Karda Nui

The Core of the Great Spirit Robot

The vast inner cavern at the core of the Matoran Universe, original home of the Av-Matoran, site of the Codrex and the final battle that decided the fate of Mata Nui.

By Joe Garratt

Karda Nui was the vast inner cavern at the core of the Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control., the chamber that sat at the centre of the Great Spirit RobotThe Great Spirit Robot, explainedBionicle's whole universe lives inside a 40-million-foot robot built by the Great Beings. Here is what it is, why it was built, and how it ended. and contained the systems that allowed it to function. It was the original home of the Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets., the location of the CodrexThe CodrexA spherical vault built by the Great Beings beneath Karda Nui to house the Toa Mata in stasis and control the final phase of Mata Nui's reawakening., and the site of the campaign that ended the Destiny WarThe Destiny WarThe open conflict between the Order of Mata Nui and the Brotherhood of Makuta that ended fifty thousand years of operational secrecy and broke the Brotherhood's last assault on Metru Nui. and decided the fate of Mata NuiMata NuiBuilt by the Great Beings to restore Spherus Magna, Mata Nui sustained an entire civilisation inside his body, was deposed by Teridax, and reclaimed his purpose as a mortal on Bara Magna..

The cavern at the core#

Karda Nui was the central chamber of the Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control., an enormous open cavern situated inside the body of the Great Spirit RobotThe Great Spirit Robot, explainedBionicle's whole universe lives inside a 40-million-foot robot built by the Great Beings. Here is what it is, why it was built, and how it ended.. Its scale was such that the Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets. who lived inside it described it as their entire world. The ceiling extended upward beyond easy view, lined with vast stalactites that hung downward in formations massive enough to support permanent settlements. The floor below opened into a separate region whose original form was lost when the cavern was breached.

The cavern was not a natural feature. It was a designed component of the universe whose function lay in the systems housed inside it, most prominently the CodrexThe CodrexA spherical vault built by the Great Beings beneath Karda Nui to house the Toa Mata in stasis and control the final phase of Mata Nui's reawakening.. Karda Nui's relationship to the rest of the Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control. was structural rather than geographic. It sat at the centre. The rest of the universe was arrayed around it, with Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive., the Southern ContinentThe Southern ContinentThe Southern Continent was a vast landmass beneath the Matoran Universe, scarred by Voya Nui's separation and held under Makuta Mutran's nominal dominion., and the other major regions positioned in the body around the central core.

The Av-Matoran#

The Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets. were the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. population native to Karda Nui. They were the original MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. of Light, distinct in elemental alignment from every other MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. population in the universe, and their existence was concealed from all but a few outside the cavern itself. Their original settlements were on the floor of Karda Nui, in the period before the geological event that reshaped the cavern.

A massive earthquake struck Karda Nui early in the Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets.'s history. The shock broke the great stalactites from the ceiling, and the falling formations impaled the ground below. The Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets. responded by abandoning the floor and building their settlements on the stalactites themselves, suspended high above the surface. The villages were lit by the natural light that filled the upper portion of the cavern, and the population lived in peace for an extended period. TanmaTanma, Av-Matoran Resistance Leader of Karda NuiTanma was the Av-Matoran who took command of the Karda Nui resistance after Kirop's corruption, partnered with Lewa Nuva during the Phantoka campaign, and led the evacuation that carried the surviving Av-Matoran to Metru Nui., SolekSolekSolek was an Av-Matoran of Karda Nui who fought alongside the Toa Nuva against the Brotherhood of Makuta during the final battle for Mata Nui's awakening., PhotokPhotokPhotok was an Av-Matoran of Karda Nui who fought alongside Tanma and Solek in the resistance against the Brotherhood of Makuta during the final battle for Mata Nui's awakening., GavlaGavlaAn Av-Matoran of Karda Nui transformed into a Shadow Matoran, Gavla led Vamprah's corrupted villagers and resisted restoration., KiropKirop, Av-Matoran Leader of Karda NuiKirop was the leader of the Av-Matoran in Karda Nui, captured and transformed into a Shadow Matoran by the Brotherhood of Makuta, restored by the cry of a klakk, and a survivor of the Destiny War and the Reformation., and RadiakRadiakAn Av-Matoran of Karda Nui who was corrupted into a Shadow Matoran by a Shadow Leech, restored by a Klakk, and evacuated to Metru Nui before the Energy Storms. were among those born into the settlements during this period.

The Makuta arrive#

The peace ended when the MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. arrived in Karda Nui. The Brotherhood of MakutaThe Brotherhood of MakutaAn organization of Makuta created by Mata Nui to police his universe and build Rahi, later seized by Teridax and turned into the instrument of the Plan that overthrew the Great Spirit. had identified the cavern's strategic importance to the wider Plan and dispatched a contingent to occupy it. The arriving MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. began draining the light from the Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets., converting them one by one into Shadow MatoranShadow MatoranAv-Matoran corrupted by the Makuta in Karda Nui, drained of Light and weaponized with shadow powers. loyal to the BrotherhoodThe Brotherhood of MakutaAn organization of Makuta created by Mata Nui to police his universe and build Rahi, later seized by Teridax and turned into the instrument of the Plan that overthrew the Great Spirit.. GavlaGavlaAn Av-Matoran of Karda Nui transformed into a Shadow Matoran, Gavla led Vamprah's corrupted villagers and resisted restoration. was the first to have her light drained, becoming the first Shadow MatoranShadow MatoranAv-Matoran corrupted by the Makuta in Karda Nui, drained of Light and weaponized with shadow powers. and an ally of the MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate.. Many more followed.

The MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. contingent in Karda Nui at the time of the Destiny WarThe Destiny WarThe open conflict between the Order of Mata Nui and the Brotherhood of Makuta that ended fifty thousand years of operational secrecy and broke the Brotherhood's last assault on Metru Nui. consisted of AntrozAntrozMakuta commander who led the Phantoka assault on Karda Nui and pilot of the Jetrax T6, ultimately outmaneuvered by Kopaka's superior strategy., ChiroxChiroxA Makuta of the Brotherhood who questioned Teridax's plans before being sent to Karda Nui., VamprahVamprahVamprah hunted in absolute silence, but silence wasn't enough when Tahu outmaneuvered him in the swamp., KrikaKrikaThe cautious Mistika leader who survived by never taking unnecessary risks, until Teridax's Plan forced his hand., GorastGorastA Makuta defined by rage and ruthlessness, Gorast conquered the Visorak and became Teridax's most devoted enforcer., BitilBitilA Makuta obsessed with enslaving Toa, Bitil weaponized his Mohtrek's copying power in the final invasion of Karda Nui., and MutranMutranMutran is a Makuta of the Brotherhood of Makuta who serves as the Makuta of Voya Nui and is among the most prolific Rahi creators within the organization. Hailing from the Southern Islands, he wears the Great Shelek and commands the powers of Shadow and Silence alongside the full range of Kraata abilities, wielding a Shadow Blade, Shadow Spear, and Tridax Pod in combat.. AntrozAntrozMakuta commander who led the Phantoka assault on Karda Nui and pilot of the Jetrax T6, ultimately outmaneuvered by Kopaka's superior strategy. commanded the field operation. The group was divided into two postures: a strike force operating in the upper cavern to engage the Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets. and any intruders, and a recovery force in the Swamp of SecretsSwamp of SecretsThe Swamp of Secrets was the mutagen-saturated wetland that filled the floor of Karda Nui after the Great Cataclysm, serving as a Brotherhood stronghold until the Energy Storms. below tasked with retrieving the KanohiKanohiMasks that grant powers and sustain life, they're the most vital artifact in the Matoran Universe. IgnikaThe Mask of Life (Kanohi Ignika), explainedA failsafe forged by the Great Beings to recharge a god. It curses everyone who touches it, and by the end of Bionicle it had learned how to be a hero.. IcaraxIcaraxHe thought scheming was for the weak and said so out loud, so the canon made sure the thing that finally killed him was a scheme. was eventually summoned from DestralDestralThe headquarters island of the Brotherhood of Makuta, whose installed teleportation technology made the entire landmass mobile and turned it into the most strategically protected location in the Matoran Universe. by VicanVicanVican is a mutated Le-Matoran who previously served as a Shadow Matoran and as an assistant to Mutran. He wears a powerless Shelek, wields claws, and bore the black and lime coloring of his time as a Shadow Matoran. Connected to the element of Air, Vican resides on Spherus Magna. carrying a tablet of transit, after AntrozAntrozMakuta commander who led the Phantoka assault on Karda Nui and pilot of the Jetrax T6, ultimately outmaneuvered by Kopaka's superior strategy. decided the situation required additional senior force.

The Swamp of Secrets#

The Swamp of SecretsSwamp of SecretsThe Swamp of Secrets was the mutagen-saturated wetland that filled the floor of Karda Nui after the Great Cataclysm, serving as a Brotherhood stronghold until the Energy Storms. occupied the lower region of Karda Nui in the period of the Destiny WarThe Destiny WarThe open conflict between the Order of Mata Nui and the Brotherhood of Makuta that ended fifty thousand years of operational secrecy and broke the Brotherhood's last assault on Metru Nui.. The swamp had not always existed. It was the product of the Great CataclysmThe Great CataclysmThe day Makuta Teridax put the Great Spirit to sleep, the Great Spirit Robot fell from the sky, Metru Nui flooded, and Voya Nui tore loose from the Southern Continent., when Voya NuiVoya NuiAn island born from catastrophe and hiding the universe's most powerful artifact, Voya Nui was everything Bionicle 2006 promised: danger, mystery, and a race against time. broke loose from the Southern ContinentThe Southern ContinentThe Southern Continent was a vast landmass beneath the Matoran Universe, scarred by Voya Nui's separation and held under Makuta Mutran's nominal dominion. and the resulting breach in the dome above admitted seawater from Aqua MagnaAqua MagnaThe endless ocean where the Matoran Universe found refuge and Mata Nui made his final stand.. The water that flowed down into Karda Nui carried Pit MutagenMutagenPit Mutagen was a power-source energy that leaked into the waters of The Pit during the Great Cataclysm and mutated almost every being exposed to it., the same substance that had transformed the PitThe PitThe Order of Mata Nui's maximum-security underwater prison where the Barraki warlords were held until catastrophe broke their chains. escapees, and the floor of the cavern was reshaped into a mutagenic wetland.

The swamp was hostile to most life. Beings exposed to its waters for extended periods underwent forced biological mutation. The Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. who descended into the swamp on the recovery mission for the IgnikaThe Mask of Life (Kanohi Ignika), explainedA failsafe forged by the Great Beings to recharge a god. It curses everyone who touches it, and by the end of Bionicle it had learned how to be a hero. were each subjected to adaptive mutations to allow survival, with the Mask of LifeThe Mask of Life (Kanohi Ignika), explainedA failsafe forged by the Great Beings to recharge a god. It curses everyone who touches it, and by the end of Bionicle it had learned how to be a hero. itself providing the modifications that kept them alive in the new environment. The MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. operating in the swamp were similarly affected; KrikaKrikaThe cautious Mistika leader who survived by never taking unnecessary risks, until Teridax's Plan forced his hand. developed an intangible form, and GorastGorastA Makuta defined by rage and ruthlessness, Gorast conquered the Visorak and became Teridax's most devoted enforcer. developed a paralytic stinger, as part of the same adaptive process.

The Codrex#

The CodrexThe CodrexA spherical vault built by the Great Beings beneath Karda Nui to house the Toa Mata in stasis and control the final phase of Mata Nui's reawakening. was the central installation inside Karda Nui and the operational reason for the entire Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. campaign. It was a sealed metallic structure containing the original ToaThe Toa: Heroes of the Matoran UniverseThe Toa were biomechanical guardians sworn to protect the Matoran, bound by a strict code and defined by sacrifice across every age of the universe. canisters in which the Toa MataToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. had been stored, the three vehicles known as the Rockoh T3Rockoh T3One of three vehicles hidden in the Codrex, piloted by Pohatu during the climax of Karda Nui's story., Jetrax T6Jetrax T6An ice-element airship stolen by Makuta Antroz in the climax of the Karda Nui conflict., and Axalara T9Axalara T9A sleek airborne tank equipped with Midak Skyblasters, the Axalara T9 was Lewa's weapon when air superiority mattered most in Karda Nui., and the control systems used to awaken Mata NuiMata NuiBuilt by the Great Beings to restore Spherus Magna, Mata Nui sustained an entire civilisation inside his body, was deposed by Teridax, and reclaimed his purpose as a mortal on Bara Magna. from his forced slumber. The structure was protected by an energy field that could only be lowered through the insertion of six keystones into a niche on its exterior.

The Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. gathered the six keystones over the course of the Karda Nui campaign, fighting the MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. for individual pieces and eventually consolidating the full set. The keystones were inserted, the shield was dropped, and the Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. entered the Codrex. AntrozAntrozMakuta commander who led the Phantoka assault on Karda Nui and pilot of the Jetrax T6, ultimately outmaneuvered by Kopaka's superior strategy. slipped in behind them. Inside, the Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. found the chamber where their canisters had been stored, accessed the vehicles, and learned that the six massive Lightstones in the Codrex were the system through which Mata NuiMata NuiBuilt by the Great Beings to restore Spherus Magna, Mata Nui sustained an entire civilisation inside his body, was deposed by Teridax, and reclaimed his purpose as a mortal on Bara Magna. would be awakened.

The awakening and the Energy Storms#

The standard awakening procedure would have taken longer than the remaining time allowed. GaliGali, Toa of WaterThe Toa Nuva of Water and conscience of the Toa Mata, whose attunement to her element anchored the team across every campaign from Mata Nui to Karda Nui. requested the Toa IgnikaToa Ignika, the Mask of Life Made ToaThe brief Toa form taken by the Kanohi Ignika after the death of Matoro, built from the organic life of the Swamp of Secrets and sacrificed to reawaken Mata Nui and again in the Battle of Bara Magna. to accelerate the process using the Mask of LifeThe Mask of Life (Kanohi Ignika), explainedA failsafe forged by the Great Beings to recharge a god. It curses everyone who touches it, and by the end of Bionicle it had learned how to be a hero.'s own power. The Toa IgnikaToa Ignika, the Mask of Life Made ToaThe brief Toa form taken by the Kanohi Ignika after the death of Matoro, built from the organic life of the Swamp of Secrets and sacrificed to reawaken Mata Nui and again in the Battle of Bara Magna. agreed and sacrificed its body to complete the awakening, releasing the mask in its original form and starting the sequence that would bring Mata NuiMata NuiBuilt by the Great Beings to restore Spherus Magna, Mata Nui sustained an entire civilisation inside his body, was deposed by Teridax, and reclaimed his purpose as a mortal on Bara Magna. back to consciousness.

Awakening produced the Energy StormsEnergy StormsThe raw-energy maelstroms that filled Karda Nui whenever Mata Nui was awakened, incinerated the Brotherhood of Makuta contingent at the climax of the Final Battle, and supplied the Great Spirit Robot with the energy it needed to function.. The storms had been a known consequence of the procedure; TakanuvaTakanuvaHidden among the Ta-Matoran as Takua, the disguised Av-Matoran who became Takanuva was the sole Toa of Light produced in the Matoran Universe's full history. had warned the Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. before the operation that an energy storm would destroy everything in Karda Nui when Mata NuiMata NuiBuilt by the Great Beings to restore Spherus Magna, Mata Nui sustained an entire civilisation inside his body, was deposed by Teridax, and reclaimed his purpose as a mortal on Bara Magna. awoke. The Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. sealed themselves inside the Codrex's protective shielding using the original ToaThe Toa: Heroes of the Matoran UniverseThe Toa were biomechanical guardians sworn to protect the Matoran, bound by a strict code and defined by sacrifice across every age of the universe. canisters and survived. Everyone outside that shelter did not.

The first storm killed every Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets. and Shadow MatoranShadow MatoranAv-Matoran corrupted by the Makuta in Karda Nui, drained of Light and weaponized with shadow powers. still in Karda Nui who had not been evacuated. The second storm incinerated the MakutaMakuta (Species)Shadowy Antidermis beings and the Brotherhood's elite, Makuta commanded darkness and shaped the Matoran Universe's fate. contingent. AntrozAntrozMakuta commander who led the Phantoka assault on Karda Nui and pilot of the Jetrax T6, ultimately outmaneuvered by Kopaka's superior strategy., ChiroxChiroxA Makuta of the Brotherhood who questioned Teridax's plans before being sent to Karda Nui., VamprahVamprahVamprah hunted in absolute silence, but silence wasn't enough when Tahu outmaneuvered him in the swamp., MutranMutranMutran is a Makuta of the Brotherhood of Makuta who serves as the Makuta of Voya Nui and is among the most prolific Rahi creators within the organization. Hailing from the Southern Islands, he wears the Great Shelek and commands the powers of Shadow and Silence alongside the full range of Kraata abilities, wielding a Shadow Blade, Shadow Spear, and Tridax Pod in combat., and BitilBitilA Makuta obsessed with enslaving Toa, Bitil weaponized his Mohtrek's copying power in the final invasion of Karda Nui. were killed in the second storm. IcaraxIcaraxHe thought scheming was for the weak and said so out loud, so the canon made sure the thing that finally killed him was a scheme. had already been killed by GorastGorastA Makuta defined by rage and ruthlessness, Gorast conquered the Visorak and became Teridax's most devoted enforcer. in an earlier engagement. KrikaKrikaThe cautious Mistika leader who survived by never taking unnecessary risks, until Teridax's Plan forced his hand. and GorastGorastA Makuta defined by rage and ruthlessness, Gorast conquered the Visorak and became Teridax's most devoted enforcer. were killed by the storms as well. The Swamp of SecretsSwamp of SecretsThe Swamp of Secrets was the mutagen-saturated wetland that filled the floor of Karda Nui after the Great Cataclysm, serving as a Brotherhood stronghold until the Energy Storms. burned out. The Karda Nui contingent of the Brotherhood of MakutaThe Brotherhood of MakutaAn organization of Makuta created by Mata Nui to police his universe and build Rahi, later seized by Teridax and turned into the instrument of the Plan that overthrew the Great Spirit. ceased to exist.

Aftermath#

Mata NuiMata NuiBuilt by the Great Beings to restore Spherus Magna, Mata Nui sustained an entire civilisation inside his body, was deposed by Teridax, and reclaimed his purpose as a mortal on Bara Magna. awoke after the storms had finished their work. The cavern was effectively dead, its surviving population evacuated and its principal structures incinerated or rendered useless. The awakening sequence completed exactly as designed; the side effects had also unfolded exactly as designed, and the cost was paid in full inside Karda Nui rather than across the wider Matoran UniverseMatoran UniverseA civilization of biomechanical beings living inside a colossal robot, destroyed when Teridax seized control.. The CodrexThe CodrexA spherical vault built by the Great Beings beneath Karda Nui to house the Toa Mata in stasis and control the final phase of Mata Nui's reawakening.'s survival of the storms ensured that the Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. survived to witness what came next.

What came next was TeridaxTeridaxTeridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna.'s seizure of Mata NuiMata NuiBuilt by the Great Beings to restore Spherus Magna, Mata Nui sustained an entire civilisation inside his body, was deposed by Teridax, and reclaimed his purpose as a mortal on Bara Magna.'s body. The awakening that the Toa NuvaToa Mata and Toa NuvaSix biomechanical heroes created by the Great Beings to awaken Mata Nui and defeat the Brotherhood, transformed once and tested across an entire age. had triggered in the CodrexThe CodrexA spherical vault built by the Great Beings beneath Karda Nui to house the Toa Mata in stasis and control the final phase of Mata Nui's reawakening. was the awakening that TeridaxTeridaxTeridax orchestrated a thousand-year scheme that ended with him occupying the Great Spirit Robot itself before his death on Bara Magna. had been waiting for. The BrotherhoodThe Brotherhood of MakutaAn organization of Makuta created by Mata Nui to police his universe and build Rahi, later seized by Teridax and turned into the instrument of the Plan that overthrew the Great Spirit.'s Karda Nui contingent had been a holding force whose loss was acceptable so long as the awakening proceeded; the awakening proceeded, and the Plan moved into its final stage. Karda Nui had served its function in the design of the universe. The cavern that had been the home of the Av-MatoranAv-MatoranThe Light-element Matoran, prototypes of their species, who colonised Karda Nui from the Southern Continent and built the Stalactite Villages above the Swamp of Secrets. was sealed inside the body of the Great Spirit RobotThe Great Spirit Robot, explainedBionicle's whole universe lives inside a 40-million-foot robot built by the Great Beings. Here is what it is, why it was built, and how it ended. as the wider war moved to its conclusion outside.

Frequently asked questions

What is Karda Nui?
Karda Nui was the vast inner cavern at the core of the Matoran Universe, the chamber that sat at the centre of the Great Spirit Robot and contained the systems that allowed it to function. It was the original home of the Av-Matoran and the location of the Codrex.
Who lived in Karda Nui?
The Av-Matoran, the original Matoran of Light, were the population native to Karda Nui. After a massive early earthquake broke the great stalactites from the ceiling, they abandoned the cavern floor and built their settlements on the stalactites themselves, suspended high above the surface.
Why did the Makuta come to Karda Nui?
The Brotherhood of Makuta identified the cavern's strategic importance to the wider Plan and dispatched a contingent to occupy it. The Makuta began draining the light from the Av-Matoran, converting them one by one into Shadow Matoran loyal to the Brotherhood, with Gavla becoming the first Shadow Matoran.
What was the Swamp of Secrets in Karda Nui?
The Swamp of Secrets was the mutagenic wetland in the lower region of Karda Nui. It formed during the Great Cataclysm when Voya Nui broke loose and seawater carrying Pit Mutagen flowed down into the cavern, reshaping the floor and forcing biological mutation on beings exposed to its waters.
What happened to Karda Nui at the end of the war?
When the Toa Nuva triggered Mata Nui's awakening from the Codrex, the resulting Energy Storms incinerated everything outside the Codrex's shielding. The first storm killed the remaining Av-Matoran and Shadow Matoran, the second incinerated the Makuta contingent, and the devastated cavern was sealed inside the Great Spirit Robot.

Gallery

Karda Nui โ€” image 2
Karda Nui โ€” image 3
Karda Nui โ€” image 4

Images via BIONICLE Wiki (Biosector01)

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