Saga Guides/The Dark Time
The Matoran Universe was grievously damaged after the Great Cataclysm, and with the sleep of the Great Spirit Mata Nui, the world began to fall from grace. The Dark Time was the 1,000 year period following the Toa Hordika's triumph in the Great Rescue, but situated before the arrival of the Toa Mata. Also of note during this time was the Po-Matoran Ahkmou, who was rescued from the labyrinths beneath Mata Nui and deceived by Makuta Teridax. He would come to live a life of trickery and ill-will among his Matoran brothers during the period.
Each of the villages of Mata Nui were successfully built during the earlier moments of the Dark Time, and the mandatory patrol forces were established. One year after the confrontation for the Vahi, Teridax captured many of the island's Rahi and fitted them with Infected Kanohi. For the duration of the 1,000 year period, he would torment, isolate, and provoke fear in the Turaga's settlements.
The terrible conflict of the Dark Hunter/Brotherhood of Makuta War also began in the Matoran Universe during the Dark Time and would last throughout its entire duration, stretching even into current times.
One hundred years into to Dark Time, the Matoran villagers of Voya Nui built a village on a newly formed portion of their island from a molten Protodermis leak. It was named Mahri Nui, and it brought joy into the tough life of the island's inhabitants. However, five hundred years later, the landmass containing Mahri Nui sank beneath the waves. The city collided with the Barraki fortress near The Pit, and destroyed it.
The massive impact released air bubbles from the nearby Airweed fields and encased the city, allowing the Matoran of Mahri Nui to survive beneath the sea. During the brief time that the Matoran were exposed to the mutagen in the waters, their bodies became bigger and stronger, undoing much of the Karzahni's works. After the catastrophe, the Mahri Nui Matoran soon forgot their life on the surface and began their new life underwater, as they tamed Hydruka beasts for air harvesting. They also formed their first Matoran Council.
500 Years ago A rogue band of Visorak came onto the shores of Metru Nui, hoping to complete what Roodaka and Sidorak had failed to do, but were defeated by Turaga Dume, the Rahaga, and Keetongu.
Kai, Amaya, Macku, and Marka were all rowing when a Great Temple Squid attacks them. Only Amaya's bravery saved Ga-Koro.
A massive hurricane struck Voya Nui around this time, and Dalu wanted to watch it from outside. Kazi tried to stop her, but they both were knocked out by the storm's power. Axonn saved them, but only Kazi saw him.
Takua's Quest Because Takua was discontent with remaining in Ta-Koro and working, he was banished, and subsequently left the city-village. At his departure, Jaller told him that Turaga Whenua had a special task for him. Making his way to Onu-Koro, he found that Whenua had been abducted, and his Badge of Office, the Drill of Onua, stolen. Takua entered the caves where the Rahi lived, and there he was able to save Whenua from a hostile Vatuka. In his exploration, he also found the Toa Stone of Earth, and retrieved two purification crystals for Onu-Koro's Vuata Maca. Whenua warned Takua that the threat of the Rahi had grown, and goaded him into assess the status of the other villages. He traveled to Ga-Koro.
In the floating village of Water, Takua discovered that Nokama, Turaga of Ga-Koro, had also gone missing. He went to the local lair of the Makika, and escaped with Nokama. He also acquired the Toa Stone of Water. After healing Ga-Koro's Vuata Maca tree, Takua wandered away from the village and north, to the desert settlement of Po-Koro.
He met Onewa, and later on in his occupation of the region, he found the Toa Stone of Stone. He eventually took his leave of Po-Koro after curing the village's Vuata Maca tree and establishing his name in the village game of Kolhii, and journeyed far south into Le-Wahi.
Takua arrived in the realm of Le-Wahi, but could not gain access as the village was spread above him in the jungle canopy. After gaining the knowledge how to enter the Koro, he learned that the Le-Matoran's Turaga, Matau, had been taken by an eagle. Takua then set out to find the eagle's nest. He discovered it in Le-Wahi, as well as the Turaga. Takua earned Matau's Kau Kau Staff because of his staunch bravery, found two purification crystals and later came in possession of the Toa Stone of Air.
In Ko-Koro, Takua found that Turaga Nuju was missing and went to find him. He found Nuju lost in The Drifts. He later recovered two Vuata Maca Crystals and Toa Stone of Ice. Then, only one of the elemental artifacts remained. He left the mountains of Ko-Koro and headed at last back to his home, to Ta-Koro.
When Takua arrived in the village of Fire, Turaga Vakama was unsure if he could believe Takua's talk of great adventure, and decided to test him by requesting the retrieval of an antidote to a poison which was present in the village's water supply. A little later, Vakama was kidnapped. Takua found the antidote, then discovered the Turaga a prisoner of a group of Fire Mahi and freed him. Vakama apologized for doubting him and Takua set off for to find the Toa Stone of Fire, the completion of the six. Takua climbed to the very pinnacle of the Mangai Volcano, where he found the last Stone. After collecting the object and two more crystals, he returned to the village and gave the crystals. Going back to the volcano to investigate a strange contraption, he ending up descending the mountain through the daring use of an active lava tube, and reaching the Kini-Nui, where the six Turaga congratulated him on completing his quest.
Takua falling on Ta-Wahi beach. In truth, the Turaga did not know what would happen when the Toa Stones were placed at Kini-Nui. When Takua placed each stone in its place at the temple, it caused a great burst of energy that ultimately rendered Takua airborne. Takua landed at the beaches of Ta-Wahi, where he later awoke with complete amnesia. At first unknown to all, the energy had summoned the six Toa Canisters that held the Toa Mata to the shores of Mata Nui. The legendary Toa had finally arrived, heralding the end of the Dark Time.
It was revealed by Kongu in BIONICLE Legends 3: Power Play that there was, at some point in time, a Shadow Plague on Mata Nui.