Shadow Leech

"What slipped past Tanma was a slime-covered leech about two feet long, faintly glowing with a pale, sickly light."

- Narrator, Shadows in the Sky

A Shadow Leech was a mutated Kraata created by Mutran, Tridax and Chirox that had the ability to suck elemental and moral light out of a being, similar to one of the functions of the Kanohi Avsa. For example, a Matoran whose light has been sucked out of would then become a Shadow Matoran gaining the element of Shadow and losing their original element. The only known cure for infection by a shadow leech is the sonic scream of a klakk. All Shadow leeches were killed by the Energy Storm.

Known Victims

 * Gavla (former Av-Matoran, later reversed by a Klakk)
 * Kirop (former Av-Matoran, later reversed by a Klakk)
 * Takanuva (gaining the element of Shadow, later reversed by a Klakk)
 * Vican (former Le-Matoran, the first known victim to be cured by a Klakk)
 * Vultraz (former Ta-Matoran)

Contrary to popular belief, the former Av-Matoran Radiak was not a victim of a Shadow Leech; his light was actually sucked out by Makuta Vamprah's Kanohi Avsa.

Trivia

 * The features of the Shadow Leech pieces in the 2008 Makuta sets were not similar to how they were described in the BIONICLE books. The leeches were described as being at least three feet in length (which would've made the piece more slender if they wished to give it such detail).