Agnoka

The Kanohi Agnoka was created by the Great Beings so they could create beings of different elements. They eventually learned how to do this without the Great mask, and discarded it, and it fell out of the sky onto the island of Gahru Nui. The Great Beings learned that the mask could be used by anyone and to keep it from falling in the wrong hands, they created intelligent four-armed creatures, called 'Kuai' to guard it.

Soon, the Makuta learned of its existence, and went searching for it. One in particular, Makuta Cortrivu, sent Makuta Venetraze to bring it to him. Cortrivu wanted it so he could create powerful multi-elemental Rahi to serve the Brotherhood. Venetraze returned empty-handed, and Cortrivu got angry with him and mutated him. To keep the Agnoka safe, the Kuai gave the Mask to Keighvin, the first Matoran. The Agnoka was disguised as a Noble Ruru to protect it further.

The Agnoka was later returned to the Kuai, and the Kuai gave it to the Great Beings, who divided it into six Element stones. If the stones are united in the right location, the Agnoka will return to its Kanohi form.

The Toa Avohkii, with the help of Tiekess and an unnamed Kuai of Sonics, and the Makuta, plus a couple of outlawed Skakdi, are currently searching for the stones.