Akaku Nuva

"[Kopaka] stepped away from Pohatu and activated the power of his mask, enabling him to peer through tons of stones into the network of caves within Mount Ihu. It was the work of moments to find a cavern in which there was a lone Kanohi Hau Nuva, the Mask of Shielding."

- Narration, BIONICLE Chronicles 4: Tales of the Masks

The Akaku Nuva was the Kanohi Nuva Mask of X-Ray Vision, created when a destined Kanohi Akaku was dipped in Energized Protodermis and transformed. The Akaku Nuva gave its user and those nearby the power to see through solid objects and illusions. Akaku Nuva were fitted with telescopic lens to give the user(s) enhanced viewing. For some reason, this mask's power could not pierce the mist in Karda Nui or the domes of the Matoran Universe. The only beings able to activate this mask's power were Toa Nuva.

Example Usage
In BIONICLE Chronicles 4: Tales of the Masks, Kopaka used his Akaku Nuva to see through the side of Mount Ihu to locate a Kanohi Hau.

Great

 * The Toa Nuva
 * Tahu - Former secondary mask, destroyed after the sinking of Ta-Koro.
 * Gali - Secondary mask
 * Lewa - Secondary mask
 * Pohatu - Secondary mask
 * Onua - Secondary mask
 * Kopaka - Primary mask