Ruru

"Whenua nodded and concentrated as never before. His Mask of Power glowed as brightly as a sun, its light piercing the ground. Suddenly, he was able to see through solid matter, his vision extending down into a storage hold far beneath the Coliseum."

- Narration, BIONICLE Adventures 4: Legends of Metru Nui

The Kanohi Ruru was the Mask of Night Vision. The Great Ruru gave its user the power to see clearly in darkness and a limited amount of x-ray vision. It also allowed them to cast a beam of light for illumination, which could be used to blind opponents. The Noble Ruru only allowed its user to see clearly in darkness.

Ruru were carved out of a mixture of Teleport and Enlarge Kanoka on Metru Nui.

Example Usage

 * Great: In BIONICLE 2: Legends of Metru Nui, Toa Metru Whenua used his Ruru to illuminate a cave that Turaga Lhikan, Onewa, Nuju, and himself walked through. He later used his Ruru to see through the floor of the Coliseum.
 * Noble: In BIONICLE Chronicles 4: Tales of the Masks, Turaga Whenua used his Noble Ruru to watch two Manas fight each other.

Great

 * Toa Metru Whenua - Formerly; briefly lost when he became a Toa Hordika; transformed into its Noble version when he became a Turaga.

Powerless

 * Matoran Whenua - Formerly; transformed into its Great version when he became a Toa Metru.
 * Umbra
 * Garan
 * Idris

Noble

 * Turaga Vakama - Formerly secondary mask; destroyed with Ta-Koro.
 * Turaga Nokama - Secondary mask
 * Turaga Whenua - Primary mask
 * Turaga Matau - Secondary mask
 * Turaga Onewa - Secondary mask
 * Turaga Nuju - Secondary mask
 * The Toa Mata - Formerly secondary masks, lost when they became Toa Nuva.

Powerless

 * Aiyetoro
 * Ally
 * Hafu
 * Jaa
 * Kailani
 * Kapura
 * Kongu - Formerly on Metru Nui; replaced with a powerless Miru on Mata Nui.
 * Nuhrii - Formerly on Metru Nui; replaced with a powerless Kaukau on Mata Nui.
 * Taipu - Formerly; replaced with a powerless Pakari
 * Tiribomba
 * Tuuli
 * An infected Po-Matoran - Formerly; since uninfected.
 * Various Rahi - Formerly; all now uninfected.

Set Information
The Kanohi Ruru was first released in 2001 in Noble form, in dark grey, as part of the Turaga Whenua set. It was also released in five other colors, as part of the Kanohi Mask Packs. Two more of the orange Ruru were additionally found in the Manas set and four transparent blue versions of the mask were found exclusively in the Nui-Rama set, covering their eyes. A black one came with Hafu in 2001 and 2003.

The Kanohi Ruru was also released in 2004 in Great form, in black, as part of the Toa Metru Whenua set, and in Noble shape, in dark red and silver, as part of the Matoran Nuhrii set. In 2005, the Ruru was released yet again in the Toa Hordika Whenua set, this time, in its Toa Hordika-mutated version. An exclusive dark blue version was included in the Karzahni set, worn by Idris.

Ruru