BIO: Untwi, like some Av-Matoran in Karda-Nui, was transformed into a Shadow Matoran when the Brotherhood of Makuta invaded it. Before the energy storms began, he and the other Shadow Matoran were cured, but he wasn't fuled restired. Instead, he had to live his live having both light and shadow. And he liked it. After Teridax's death, he moved on to Spherus Magna and lived in the Black Spike Mts. There he had an idea. What if the Matoran were to embrace both light and shadow? What if the two could be one?
He took matters. What started out as a road to peace became a quest for power. He began to believe that he was 'pure', to be the son of Light and Shadow. HE assisainted several people before the Toa Nuva found out. But since he had Light AND Shadow on his side, he easily defeated them. Two other Toa challanged him: Begopah and Ahpolki. Together, they defeated and driven him to the wastelands. He was later killed by Tuma.
POWERS/TRAITS: While Light and Shadow would normally cancel eachother out, Untwi had a cyrtaline substance within him, which allowed him to actully combine these Elements. He was once a shy and kind Av-Matoran, but after Spherus Magna's reformation, he went insane, believing that he would bring salvation through destrution. He also believed that he was above everyone else just because of the fact he had Light.