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Hordika Venom was a type of toxin used by the Visorak. They usually injected it into their victims using small barbs lined in web cocoons. The venom could have one of two effects on its victims; it either sent them into endless sleep, or horribly mutated them into a Hordika. The mutations often made the victim very monstrous in appearance and turned their minds feral and viscous. Keetongu is the only known being in the Matoran Universe to know how to cure Hordika Venom.