Toa Hordika
Toa mutated by Visorak venom into bestial hybrids, forced to fight their primal nature and hunt for a cure.

The 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. MetruMetruIn the Matoran language a metru was a single district of Metru Nui; the city was divided into six such districts, one for each element, and the term covered both the place and the elemental community that lived in it. walked into the VisorakVisorak (Rahi)Spider-like Rahi employed by the Brotherhood of Makuta whose name meant 'Stealers of Life' and whose swarms threatened the Matoran Universe. Web expecting to rescue the MatoranMatoranThe most abundant species in the Matoran Universe, chosen by Mata Nui to inhabit and maintain his cosmic body. from Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive.. Instead, six of them were caught and injected with Hordika VenomHordika VenomThe toxin used by the Visorak to mutate captured prey into Hordika, the feral half-Rahi state that transformed the Toa Metru into the Toa Hordika in the webs above Metru Nui., a mutagenic toxin that twisted them into Toa Hordika. These creatures were grotesque hybrids: half-Toa, half-RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts. beast, forced to fight both the VisorakVisorak (Rahi)Spider-like Rahi employed by the Brotherhood of Makuta whose name meant 'Stealers of Life' and whose swarms threatened the Matoran Universe. and their own rage to keep the mutation from becoming permanent. In BIONICLEBIONICLE: Matoran AdventuresA 2002 GBA platformer where you play as one of six Matoran fighting Bohrok across Mata Nui's islands. Adventures 8: Challenge of the Hordika, the newly transformed Toa had to work together as never before, keeping their savage instincts in check while hunting for the only cure: a legendary RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts. named KeetonguKeetonguThe legendary Rahi who broke the Visorak siege and lived to prove he was worth the legend..
The Nature of the Mutation#
Hordika VenomHordika VenomThe toxin used by the Visorak to mutate captured prey into Hordika, the feral half-Rahi state that transformed the Toa Metru into the Toa Hordika in the webs above Metru Nui. rewrote the Toa's bodies and minds. Within hours, their KanohiKanohiMasks that grant powers and sustain life, they're the most vital artifact in the Matoran Universe. masks stopped responding to their will. Their tools transformed into something more primal. In place of mask power, they grew RhotukaRhotukaRhotuka were wheels of pure energy generated by living beings, shaped by the user's nature, and launched through natural or artificial launchers. Launchers, the signature weapon of the VisorakVisorak (Rahi)Spider-like Rahi employed by the Brotherhood of Makuta whose name meant 'Stealers of Life' and whose swarms threatened the Matoran Universe. themselves. More troubling was the mental cost: a constant rage that threatened to overwhelm them, pushing them toward instinct over thought. The longer the venom remained in their bodies, the closer they came to being locked in that form forever, with no way back.
The 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. Metru's Descent#
The 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. MetruMetruIn the Matoran language a metru was a single district of Metru Nui; the city was divided into six such districts, one for each element, and the term covered both the place and the elemental community that lived in it. bore the burden of this mutation first. VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years., NokamaNokamaNokama served as Toa Metru of Water, endured the Hordika mutation, and led Ga-Koro and later Ga-Metru as Turaga through three eras., MatauMatauA former Le-Metru test driver who became a Toa Metru, Matau wielded air, illusion, and shape-shifting before sacrificing his Toa power to wake the sleeping Matoran., NujuNujuNuju served as a Ko-Metru seer, Toa Metru of Ice, and Turaga of Ko-Koro who spoke only in bird calls translated by Matoro., OnewaOnewaOnewa served as Toa Metru of Stone, led Po-Koro through the Dark Time, and constructed the Metru Nui statue honoring the fallen Toa Mahri Matoro., and WhenuaWhenuaToa Metru of Earth and later Turaga of Onu-Koro, formerly an Onu-Metru archivist whose career in the Archives shaped his role across the rescue of Metru Nui and the long residency on Mata Nui. all fell to the VisorakVisorak (Rahi)Spider-like Rahi employed by the Brotherhood of Makuta whose name meant 'Stealers of Life' and whose swarms threatened the Matoran Universe.'s webs and were injected simultaneously. As described in BIONICLEBIONICLE: Matoran AdventuresA 2002 GBA platformer where you play as one of six Matoran fighting Bohrok across Mata Nui's islands. Adventures 9: Web of ShadowsWeb of ShadowsThe Toa Metru's return to a Visorak-occupied Metru Nui, their mutation into Toa Hordika, the corruption of Vakama, and the rescue that closed the city's long captivity., the Toa emerged from their capture unrecognizable to themselves and each other. They discovered they couldn't use their powers the way they had before. Their leader, VakamaVakamaA Ta-Metru maskmaker transformed into the Toa Metru of Fire, leader of his team through the Visorak war, and Turaga of Ta-Koro for a thousand years., had to relearn how to guide five mutated comrades while managing his own transformation. For the first time, the Toa were forced to rely on the Rahaga, mysterious RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts.-headed beings who revealed that they too had once been Toa.
The Search for KeetonguKeetonguThe legendary Rahi who broke the Visorak siege and lived to prove he was worth the legend.#
The only path forward was KeetonguKeetonguThe legendary Rahi who broke the Visorak siege and lived to prove he was worth the legend.. The Rahaga spoke of a great and mythical RahiRahiThe Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts., somewhere in the wastelands beyond Metru NuiMetru NuiThe city beneath Mata Nui functions as the Great Spirit's brain, housing the Matoran whose labor keeps the god alive., whose touch could cure the Hordika VenomHordika VenomThe toxin used by the Visorak to mutate captured prey into Hordika, the feral half-Rahi state that transformed the Toa Metru into the Toa Hordika in the webs above Metru Nui.. Per BIONICLEBIONICLE: Matoran AdventuresA 2002 GBA platformer where you play as one of six Matoran fighting Bohrok across Mata Nui's islands. Adventures 7: Web of the VisorakVisorak (Rahi)Spider-like Rahi employed by the Brotherhood of Makuta whose name meant 'Stealers of Life' and whose swarms threatened the Matoran Universe., the Toa set out to find him. The journey was treacherous, fought through VisorakVisorak (Rahi)Spider-like Rahi employed by the Brotherhood of Makuta whose name meant 'Stealers of Life' and whose swarms threatened the Matoran Universe. territory and the Toa's own failing grip on sanity. Some, like most of the Toa MetruMetruIn the Matoran language a metru was a single district of Metru Nui; the city was divided into six such districts, one for each element, and the term covered both the place and the elemental community that lived in it., eventually found KeetonguKeetonguThe legendary Rahi who broke the Visorak siege and lived to prove he was worth the legend. and were cured. Others weren't as fortunate. Savage, a being trapped in Hordika form, never found salvation. The cure remained possible but rare, a mercy not everyone received.
Compiled from primary sources by Lore Fortress editorial. Reviewed by Joe Garratt, Editor-in-Chief.
Sources
- BookBIONICLE Adventures 8: Challenge of the Hordika, Primary source detailing the Toa Hordika's transformation and their battles against the Visorak.
- BookBIONICLE Adventures 9: Web of Shadows, Describes the initial transformation of the Toa Metru into Toa Hordika and their first encounters with the Rahaga.
- BookBIONICLE Adventures 7: Web of the Visorak, Covers the search for Keetongu and the revelation of the only cure for Hordika Venom.
- WikiToa Hordika, BS01 wiki entry on Toa Hordika transformation, mutation mechanics, and affected individuals.
Spotted a factual error or a primary source we missed? Email a correction. Every flagged claim gets reviewed.
Followed from this entry

The Toa: Heroes of the Matoran Universe
The Toa were biomechanical guardians sworn to protect the Matoran, bound by a strict code and defined by sacrifice across every age of the universe.

Hordika Venom
The toxin used by the Visorak to mutate captured prey into Hordika, the feral half-Rahi state that transformed the Toa Metru into the Toa Hordika in the webs above Metru Nui.

Metru
In the Matoran language a metru was a single district of Metru Nui; the city was divided into six such districts, one for each element, and the term covered both the place and the elemental community that lived in it.

Rahi
The Rahi were the biomechanical wildlife of the Matoran Universe, built largely by the Brotherhood of Makuta, ranging from background fauna to engineered war beasts.

Rhotuka
Rhotuka were wheels of pure energy generated by living beings, shaped by the user's nature, and launched through natural or artificial launchers.

Keetongu
The legendary Rahi who broke the Visorak siege and lived to prove he was worth the legend.
Mentioned in74 entries
Aero Slicers
The Toa Tools wielded by Toa Metru Matau, capable of channeling Air, serving as melee blades, and doubling as glider wings and rotors for flight.
Air
One of the elemental powers of the Matoran Universe, carried by the Le- prefix across its bearers and most prominently wielded by the Toa of Air Lewa, Matau, and Lesovikk.
Blazer Claws
The mutated weapons that replaced Vakama's Disk Launcher during his time as a Toa Hordika, producing uncontrolled bursts of fire instead of guided shots.
Bomonga
Bomonga was the Toa Hagah of Earth, mutated by Roodaka into a Rahaga, later restored to Toa form and resettled on Spherus Magna.
Catcher Claw
Roodaka's natural claws, which could catch Rhotuka spinners, poison them and throw them back, and could also fire bolts of Shadow energy.
Crystal Spikes
The Crystal Spikes were the paired Toa Tools of Toa Metru Nuju, used to channel his Ice powers, to climb the Knowledge Towers and even as snowshoes.
Earthshock Drills
The earthshock drills were Toa Metru Whenua's paired Toa Tools, which could dig as shovels, drills or a jackhammer and made an ear-splitting noise when spun.
Every Bionicle Movie in Order: Mask of Light to The Legend Reborn
There are four Bionicle feature films, all released straight to home video between 2003 and 2009, plus a two-minute web short and a 2016 Netflix series for the reboot. Here is each one in release order, what happens in it, and where it sits in the story.
Ga-Matoran
The Water-element Matoran of Ga-Metru and Ga-Koro, a female Matoran type, who filled the schools of Metru Nui and crewed the boats of the Mata Nui coast.
Gate Guardian
An illusion-projecting Rahi enforcer of the Visorak horde, encountered by the Toa Hordika and Rahaga Gaaki within the Great Temple of Metru Nui.
Hordika Teeth
The mutated form of Nuju's Crystal Spikes during the Toa Hordika period, capable of summoning flying Rahi by ultrasonic resonance.
Huna
The Kanohi Huna granted full invisibility to its wearer, with the limitation that the user's shadow remained visible and detectable.
+ 62 more
Get new articles in your inbox
No spam. New lore drops, canon conflicts, and deep dives only when they’re worth reading.
Some links on Lore Fortress are affiliate links. If you buy through them we earn a small commission at no extra cost to you.

















