In order for the Matoran aboard Rarangi Nui to have a comfy lifestyle, without the need of living on the planet that they orbited, a great city was made, that encompassed half of the Station. This city was known as Metru Nui. Police forces known as Vahki patrolled the streets, as two forgers were hard at work, creating something truly special. Ekimu, a shy and humble Mask Maker, and Onewa, a prideful forger, had made the first Toa. It was jet black, with the stature of a hunchback, and it wore the Mask of Strength. They named it Onua. Things were quite well in Metru Nui, until the Makuta returned. He corrupted the minds of the Vahki, and they attacked the Matoran. The two forgers decided on making more Toa, as they knew that Onua alone couldn't stand a chance against Makuta, and they set to work as soon as they could. The results were magnificent. Lhikan, Toa of Electricity;

Vakama, Toa of Fire;

Nokama, Toa of Water;

Matau, Toa of Air;

Whenua, Toa of Earth;

Nuju, Toa of Ice;

And Onua, Toa of Earth. Together, they fought against the Vahki, until Makuta hijacked the Great Forge at the center of the station, and made thousands of Vahki, and they overwhelmed the Toa. Lhikan solemnly sent the order to sever Metru Nui from the rest of the Station. It was carried out. The Vahki were trapped in The Great City, as it was dropped into the waters below, on Aqua Magna, and it was to be forever forgotten. The heroes had won, but at a heavy cost. The Matoran had no place to live, and a portion of the foundry had to be gutted to make room for accommodation after the battle. These were truly hard times for the Matoran. It was about to get a whole lot worse.