The Kanohi Kiril was the Mask of Regeneration. It gave its user the ability to restore inanimate objects to their original, undamaged condition. It could not be used to heal living things. Turaga Dume wore a noble Kanohi Kiril.
Notes
The Kanohi Kiril was the Kanohi Mask of Regeneration.1, 2 It allowed its wearer to restore inanimate objects or buildings to their previous, undamaged conditions. It could not be used to heal living things.2
Kiril were created from Kanoka disks with the regeneration power.3
Not even a Great Kiril could heal living beings.4