Volitak

"[Nuparu] could fade into the background and make virtually no noise as he swam."

- Narration, BIONICLE Legends 7: Prisoners of the Pit

The Kanohi Volitak was the Mask of Stealth. The mask could mute common noises that the user made and render the user semi-invisible. Despite this, the user would still cast a shadow. The only masks that could see through a Volitak's usage were Arthron, Elda and Rode.

Example Usage
In BIONICLE Legends 7: Prisoners of the Pit, Nuparu used his Volitak to sneak out of a cave he was forced into by the Barraki.

Great

 * Toa Mangai Nidhiki - Formerly; lost when mutated by Roodaka.
 * Toa Mahri Nuparu - Wore an altered version.
 * Toa Chiara

Powerless

 * Mazeka
 * Matoran Nidhiki - Formerly; transformed into its Great version when he became a Toa.
 * Matoran Chiara - Formerly; transformed into its Great version when she became a Toa.

Volitak