After defeating the Skrall and seeing the rest of the villages unite, Mata Nui stands against the challenge of taking back his old body from Teridax. He learns that he was created by the Great Beings on the planet of Spherus Magna, which is now divided into a jungle moon (Bota Magna), an ocean moon (Aqua Magna), and the remaining desert planet (Bara Magna), as the result of the Core War. Mata Nui also learns that before he was built, there was a previous robot, which the Agori use as their home. An Agori of Tesara named Tarduk helps Mata Nui by showing him an ancient power source that could power up the old robot.