Kiril

"The brown Rahaga fired a lasso Rhotuka and dragged the green spider into the small crater that Dume had made. Just as the Rhotuka's energies dissipated, though, Dume activated his Noble Kiril and closed the hole in the pavement around one of the Visorak's feet."

- Narrator, The Dweller Report

The Kanohi Kiril is the Mask of Regeneration. It allows its user to repair damage to inorganic objects they can see. The amount of damage the user can repair varies between the Great and Noble. Only the Great can regenerate Protosteel; neither version can heal organic damage.

On Metru Nui, Kanohi Kiril are made from Regeneration Kanoka.

Example Usage
Noble: Turaga Dume used his Kanohi Kiril to begin reconstructing Metru Nui while the Matoran were gone (Mentioned in BIONICLE Encyclopedia: Updated).

Great

 * Toa Ceronox Borgila
 * Toa Marak Tavka
 * Toa Ronai Dume - Formerly; became Noble when he transformed into a Turaga.
 * Toa Sāh Orāni - Formerly; became Noble when she transformed into a Turaga Sāh.

Noble

 * Turaga Dume
 * Turaga Sāh Orāni
 * Makuta Teridax - Formerly; abandoned when he stopped masquerading as Turaga Dume.
 * An unknown Toa whom Toa Hagah Norik honors with his Kanohi Pehkui.

Matoran

 * Borgila - Formerly; became Great when she transformed into a Toa Ceronox.
 * Dekar - Formerly; lost when he was transformed into the second Hydraxon.
 * Delan
 * Orāni - Formerly; became Great when she transformed into a Toa Sāh.

Trivia

 * The gateway on the Tower of Toa was shaped like a Kanohi Kiril.