Shadow Matoran

Shadow Matoran were Matoran who had all Light drained out of them by Shadow Leeches. They became corrupt and evil, and gained the ability to fire bolts of shadow energy (it is unknown if only corrupted Av-Matoran have this ability or if any Shadow Matoran can). If a corrupted Matoran became a Toa, they would control the element of Shadow.

Known Shadow Matoran

 * Radiak (formerly an Av-Matoran)
 * Gavla (formerly an Av-Matoran)
 * Kirop (formerly an Av-Matoran)
 * Vican (former element unknown, but it was one of the six main elements)
 * There were apparently many more Shadow Matoran in Karda Nui, but these four were the only ones released as sets.

Trivia

 * All Shadow Matoran seen so far have been paired with a Makuta. Radiak was paired with Antroz, Gavla with Vamprah, Kirop with Chirox and Vican with Mutran.