Mutran

"I don't just experiment with the physical form, you see. I like to play with the mind as well. You Toa always have such interesting minds - filled with grief over all the horrors you have seen, fear of disappointing others, anger at your enemies. You are all flood tides of emotion, Toa Nuva, and I am about to break the dam."

- Mutran to Kopaka Nuva

Mutran was a Makuta and a member of the Brotherhood of Makuta. He specialized in mutations, along with Chirox. In Chirox's opinion, Mutran's Rahi never had enough teeth, nor were they intelligent enough.

Mutran was responsible for the bat-like appearance of the Shadow Matoran, as well as giving Radiak four legs one day when he was moody. He and the Shadow Matoran Vican, who acted as his lab assistant, were the guards to the Shadow Leech vats located deep in the heart of a hive. He and Chirox were the creators of the Shadow Leeches and the Tridax Pods.

Weapons and Abilities
Mutran wore the Kanohi Shelek, Mask of Silence, which could cause a target to temporarily lose the ability to hear or speak. His weapons included a Shadow blade and shadow spear.

Mutran had the power of flight as well as access to all 42 Makuta powers. He also wielded shadow energies. Mutran was amongst the Makuta to invade Karda Nui. Unlike the other Makuta there, Mutran was not blinded by the light that caused the revival of Mata Nui because he was not nearby when the event occurred.

History
Sometime long before the Great Cataclysm, Mutran was sent on a diplomatic mission to Xia. When he left, he accidentally left behind his Sentient Rock, which he had brought with him. When he realized he had forgotten it, he figured it wouldn't be a problem and so didn't go back for it. The rock eventually started eating Vortixx and grew into the famous Sentient Mountain.

Later, after the defeat of the League of Six Kingdoms, Mutran and another Makuta, Gorast, were sent to one of Kalmah's fortresses for clean-up duty. While there, Mutran discovered a carving telling how Kalmah had noticed something odd about some of Mutran's rahi, the Blade Burrowers. It appeared that the tunnels they dug were not random, but in fact were all of the same pattern, a map. Mutran had no idea what the Burrowers were mapping or why, and was disturbed by it.

While the Matoran war in Metru Nui was going on, Mutran was sent on a mission to meet with a legendary entity called Tren Krom. Upon finding him, Mutran's mind was probed by Tren Krom. Mutran described the entity's mind as "as far beyond mine as mine was beyond that of a fireflyer". Mutran was so horrified by Tren Krom and the experience that he almost wanted to die rather than live with the memory. He eventually blacked out, and when he came around, he realized that he had knew knowledge - knowledge that would make Teridax's schemes of overthrowing the Great Spirit possible.

Trivia

 * Greg Farshtey has stated that Mutran's name is based on the words "mutate" and "transform".
 * Mutran's set comes with a Matoran named Vican.
 * Mutran was assigned to the center of the Mainland.