Rahkshi existed before the Great Beings dreamed of creating life. When the first experiments came, he found himself wanting to create something to populate the world that he and the other beings had created, namely the giant Mata Nui robot. Eventually after the toa and matoran where created, he built his first creature, a small slug that had powerful energies, when dipped in energized liquid protodermis (the life blood of the mata nui robot) the slug would transform into a toa sized intelligent creature with a spine to distinguish species. When the BoM was charged with the responsibility of creating more life, Rahkshi asked Miserix, the first Makuta, to create more of these creatures, when the fall of the Brotherhood came, the creatures where used for evil, since they where corrupted versions created by Teridax, their genetic code changed so that they mutated into grotesque shell of the pure ones. They required another kraata to power them. Teridax called them Rahkshi, as a cruel, mocking insult to the Being that intended them to be a benevolent species. Now, he hunts them, and reduces each to a pure kraata, purging the Kraata of Teridax's evil. He has a faithful companion named Chub-Chub, though ole' Chub prefers the title Shadow'd Slug. He was the first of the pure kraata as Rahkshi believed that shadow would be the least unstable.