Aqua Magna

Aqua was the planet which Mata Nui crash-landed on as a result of the Great Cataclysm. Mata Nui and Voya Nui were the only two known landmasses on the face of the planet. In 0 BGC, the Great Spirit Mata Nui was flying through space near this planet, when he was put to sleep by Teridax's virus and crashed in the Endless Ocean. His camoflague system turned his face into the island of Mata Nui, while Voya Nui rocketed out of his stomach and ended up in the ocean. Mata Nui was destroyed when the Great Spirit stood up for the first time since the Great Cataclysm. Voya Nui sank back to the BIONICLE Mainland inside Mata Nui's chest when the Stone Cord was broken.