Fresh from their victory over the Makuta, the inhabitants of Mata Nui face a new and desperate threat from the Bohrok Swarms. Robotic bugs, driven by determined krana life forms, ravage the island. Toa and Matoran alike struggle to stop the relentless advance of the Bohrok legions.
Makuta was gone.
It didn’t take long for the villagers and Toa of Mata Nui to sense their next challenge. Ever at the center of things, Takua returned from Makuta’s underground lair with a tale of strange new beings set free deep beneath the surface.
Even before celebrations of Makuta’s defeat were completed, the Toa began hearing reports of bug-like creatures swarming across Mata Nui, destroying the landscape and buildings, but not harming the Matoran themselves. One villager from Ta-Koro struggled to the Toa and could only utter one word, over and over.
Bohrok. Bohrok. Bohrok.
Soon, the Bohrok were everywhere. Turaga Vakama informed the Toa there were six different breeds of Bohrok: Gahlok, Nuvok, Pahrak, Tahnok, Lehvak, and Kohrak. Each one powered by a rubbery krana that rested beneath the Bohrok’s smooth shell. There were eight different types of krana, and each held a special power. The Toa, according to Vakama, must collect all 96 different types of krana in order to stop the swarms from completely destroying the island. The Toa spread out in search.
Toa Lewa headed for Le-Koro, but instead of his villagers, he found Turaga Matau with a krana resting on his face in place of a Kanohi mask. The Matoran were likewise infected. Rather than fight those he had sworn to protect, Lewa submitted to the krana. He had no choice.
Other villages were luckier. Underground Onu-Koro fought off a swarm, but several Matoran were trapped underground. Nuparu, one of the engineers, discovered a Gahlok with its krana missing and discovered each Bohrok was simply a machine controlled completely by the krana. He managed to cobble together another machine out of the parts, and his new Boxor vehicle design spread to other villages. When used in large numbers, Matoran driving Boxors were able to hold their own against a Bohrok swarm.
While infected Lewa stayed in Le-Koro, the other Toa collected the rest of the krana. They flooded canyons, trapped Bohrok in rockslides, and tricked or fought the Bohrok long enough to gather all they needed. Toa Onua found Lewa at last, and managed to convince Lewa he was stronger than the krana. Lewa broke free of the creatures’ control, but could still “hear” the Bohrok from his nearly-severed connection.
Meanwhile, Toa Kopaka discovered a large cave entrance and with Toa Tahu decided to bring all the krana. They had found the Bohrok nest. All Toa assembled at the mouth of the cave, Lewa assisted the group with his link to the Bohrok, and the Toa discovered six passageways lined with niches mean for krana. But simply placing the krana in their niches didn’t stop the swarms.
Further along the passageways, the Toa discovered powered armor, Exo-Toa machines. Donning them, they found at last the true Bohrok commanders: The Bahrag twins, Cahdok and Gahdok. These fearsome-looking creatures shrugged off the Toa’s attacks with ease, until Tahu discovered the Exo-Toa suits were preventing them from using their elemental powers. Once the Toa took off the suits, they were able to combine their powers and trap the Bahrag in a cage of glowing protodermis.
Outside, the Bohrok stopped in mid-action.
Their victory was short-lived, as the ground beneath the Toa opened up beneath them and they fell into energized protodermis. The Toa emerged transformed into… something else.