Crast

The Kanohi Crast was the Mask of Repulsion, a Kanohi that allowed its bearer to create a charged Repulsion Field around themselves, repelling an object or assailant with tremendous force. While the mask could only be used on one target at a time, its magnetic force often proves an effective countermeasure against physical assault, though it can be resisted if a target approaches the bearer with enough inertia. Moreover, the Crast has been used to repel the bearer off the ground, creating the illusion of flight.

History
The Kanohi Crast traces its origins back to some of the earliest mask-making techniques adopted on Metru Nui, where an unclear number of Crast masks were created for the Matoran populace. At this point in the history of the Matoran Universe, the Crast bore no elemental affiliation and efforts to craft the mask proved highly volatile.

Following the Velika's Awakening of the Matoran Universe's inhabitants after the Great Spirit Robot left Spherus Magna, the Crast came to be considered a highly Immoral Kanohi by Matoran crafters. As such, Matoran generally chose to abandon their Kanohi Crast, fearful of its destructive properties.

Over the 100,000 year span of the Matoran Universe's functionality, the Crast became an uncommon Kanohi, proving more popular among members of the Makuta species. In Metru Nui the mask could crafted with relative ease exclusively using Shrink and Enlarge Kanoka disks, though Turaga Dume later outlawed the production of Immoral Kanohi.

Unfettered by the restraints of the Matoran conscience, both Makuta Krika known to have worn a Great Crast as his signature Kanohi.

Great

 * Makuta Krika - Shape-Shifted; Deceased