Volitak

The Kanohi Volitak was the Mask of Stealth.

History
As with most Kanohi masks, the Volitak was discovered and forged at some point via the combination of varying Kanoka disks. It is not widely known for certain what Kanoka disks are involved with its forging, although some speculation has arisen regarding weaken disks. When the mask was first discovered, the patterns for its creation were safeguarded in order to create more.

What is known is that Nidhiki, prior to his transformation into a Toa, had a powerless Volitak. When he transformed into a Toa, it became its Great version, and allowed him full access to his powers. It is believed that using the mask is how he managed to hide his dealings with the Dark Hunters for as long as he did. When Nidhiki was mutated by Roodaka, the mask melded with his face and was twisted out of shape.

Nuparu was also a notable user of the mask, and gained it upon his transformation into a Toa Mahri, after following the Ignika through the Cord. He used the mask to great effect in order to spy on the Barraki's operations and also used it to escape a cave the Barraki had forced him into.

Chiara was also known to have had a powerless Volitak as a Matoran and it became a Great version of the mask when she became a Toa. She was thought to use it often in her search for the Great Beings to scope out danger. She also came across Mazeka, who wore a powerless version of the mask, and the two shared mirth that he generally found little need for it anyway, as he possessed training from the Order which made the mask non-essential.

Powers
The Volitak was the Kanohi Mask of Stealth. In its powerless form, it behaved like all other Matoran masks. In its Great form, the mask could deafen any sound made by the wearer and gave them semi-invisibility, although the user's shadow would still be wholly visible. The Noble version of the mask granted no invisibility and the wearer's footsteps only would be dulled, although their shadow was slightly less pronounced.