2003

2003 was the third and final year of the Bionicle Chronicles story arc. It was divided into two halves: the Bohrok-Kal Saga and the Mask of Light Saga.

The Bohrok-Kal Saga
After the Toa Mata defeated the Bahrag and sent the Bohrok swarms back to sleep, becoming Toa Nuva in the process, they went their separate ways. Little did they know, they had awakened the Bohrok-Kal, six special Bohrok designed as a fail-safe so that in the case of the Bohrok swarms being stopped they could free the Bahrag. To do this, the Bohrok-Kal needed the Nuva Symbols that gave the Toa Nuva their elemental energy. They stole the symbols, causing the Toa Nuva to lose control over their elements, and they began to look for the Bahrag. No matter how hard the Toa Nuva tried, they were hopeless against the Bohrok-Kal without their elements.

Finally, the Bohrok-Kal found the Bahrag and destroyed the Exo-Toa. They were about to be freed when Toa Nuva Gali had the idea to get the symbols to channel power into the Bohrok-Kal. Eventually, an overload of power destroyed them, and there was peace on Mata Nui once more.

The Mask of Light
The island of Mata Nui celebrated the victory over the Bohrok-Kal with a kolhii game in a newly-built stadium in Ta-Koro. Just before the game, a Matoran named Takua found a strange Great Mask (little did they know at the time it was the Avohkii, Great Mask of Light), and after the game, the Matoran, Turaga, and Toa found out about it. Turaga Nokama read a prophecy on the mask about a Seventh Toa, and Turaga Vakama sent Jaller, the Matoran who was believed to be the Herald of the Seventh Toa, and Takua (who Jaller enlisted for company knowing that Takua was the true Herald) to find the Seventh Toa.

While they searched, Teridax unleashed his 'sons', Rahkshi, to find the Mask of Light and prevent the Seventh Toa from coming into being. In their search, they destroyed everything in their path. Toa Nuva Tahu became poisoned by a Lerahk and enraged by a Kurahk, driving him to attack the other Toa. Ta-Koro and Onu-Koro were destroyed.

In the final battle against the remaining Rahkshi, a Turahk, Kurahk, and Vorahk, Jaller was killed. But Takua put on the Mask of Light and became the Seventh Toa: Takanuva, Toa of Light. After the battle, he built a vehicle called the Ussanui. Several days later, he rode it into Makuta's lair and confronted him once and for all with a game of kolhii.

In the end, the two were fused by energized protodermis and became Takutanuva. Takutanuva held open a large stone door for the Matoran, Turaga and Toa to go through to awaken the Great Spirit Mata Nui. While doing so, he revived Jaller, but this used too much power, and he was crushed by the stone door. However, Takanuva was revived by the light and the group attempted to awaken Mata Nui. They did not succeed, but they did start on their way to the first step of doing so: they found their long-lost city home, Metru Nui, and began to build boats to sail to it.