Olisi

The Kanohi Olisi was the Mask of Alternate Futures, worn by Karzahni. It allowed the user to project a vision of an alternate future or a possible future into their and another's mind. The user could use their thoughts or thoughts of the victim to create the alternate future.

Example Usage
Karzahni used his Olisi to create a vision of what would happen if Mata Nui died. The sight shocked him so much that he was momentarily stunned, allowing six Matoran victims to escape.

Trivia

 * After being mutated by Pit Mutagen, Karzahni's mask fused to his head, but was still operational.