Shadow Matoran

Shadow Matoran or Kra-Matoran were Matoran who had all Light drained out of them. They became corrupt and evil, and gained the ability to fire bolts of shadow energy. If a corrupted Matoran became a Toa and later a Turaga, they would control the element of Shadow.

The Brotherhood of Makuta used mutated Kraata called Shadow Leeches to drain the light from numerous Av-Matoran among other types of Matoran, after which they served the Makuta operating in the Universe Core. Both Gorast's stinger and a Kanohi Avsa could also drain light.

A Klakk could restore Light to a Matoran by their Sonic screams to break the barrier around a Matoran, Toa, or Turaga that kept new light from coming. Although the Shadow Matoran in Karda Nui were restored by Klakks' sonic screams, they still exhibited Shadow abilities, probably because their bodies became accustomed to the extensive exposure to Elemental Shadow. All Shadow Matoran except Vultraz were cured by the Klakk.

Known Shadow Matoran

 * Radiak- former Av-Matoran, cured
 * Gavla -former Av-Matoran, cured
 * Kirop - former Av-Matoran, cured
 * Vican - former Le-Matoran, cured
 * Vultraz - former Ta-Matoran
 * A Shadow Matoran that got tangled in Lightvine outside the Stalactite Village.