A new storyline begins on the "mythical island of Okoto", whose resident Okotans are Matoran/Agori like villagers who wear masks forged by the brother Mask Makers Ekimu and Makuta. Ekimu wore the Mask of Creation and Makuta wore the Mask of Control, but Ekimu's masks were favored over his brother's, causing Makuta to become filled with jealousy and bitterness. As a result, he broke a sacred code of the Mask Makers and forged the Mask of Ultimate Power, which contained the powers of all six of Okoto's elements: Fire, Ice, Jungle, Water, Stone, and Earth. When he donned the mask, its power overwhelmed him, and Ekimu was forced to knock it from Makuta's face: the mask then exploded, releasing energies that drew Makuta and Okoto's capital city into the Shadow Realm and devastated Okoto, utterly changing its terrain. Ekimu was rendered comatose, but his body spoke the words of a prophecy by which the legendary Toa, heroes with the powers of the Elements, could be summoned in the time of Okoto's greatest need.