High Quality Content by WIKIPEDIA articles! In the universe, Kanohi are masks that grant their wearers specific powers. Various types of Kanohi exist, including Matoran, Noble, Great, Nuva, and Legendary. Matoran Masks are powerless but are vital to the survival of the Matoran, who will slip into a coma if they go without wearing one for an extended period of time. Noble Masks can be used by Turaga and are less powerful than the Great Masks, which are used commonly by Toa. Legendary Masks are the most powerful Kanohi and are much more difficult to control than other Kanohi. Only three Legendary Kanohi (Mask of Creation, Mask of Life, and Mask of Time) exist and only one being, Artakha, is known to be able to control one. Noble, Great, and Legendary masks contain powers that can be used by beings with sufficient mental discipline and willpower; Matoran are incapable of using any mask powers, while Turaga can only use Noble masks. Kanohi Nuva, which are more powerful than standard Kanohi and allow the user to share the mask`s power with nearby beings, can only be used by the Toa Nuva.