The Kanohi Ovcina is the Mask of War Cries. When activated, the Mask would boost the strength and speed of the wearer, as well as reducing the amount of damage they take. The Nuva version allowed others near the user to share this boost in power. However, the mask will "overheat" after a certain, and will have to "cool down" before it can be used again. It has been speculated that repeated usage may cause some mental damage to the user, though this has yet to be proven.