Aurora Unit 313 was the final boss in Metroid Prime 3: Corruption, and the final boss in the Prime trilogy. A Galactic Federation Aurora Unit stolen by Space Pirates from the G.F.S. Valhalla, under the orders of Dark Samus. AU 313 was an organic supercomputer originally used to assist and interface with the crew of Federation starships. As it was being removed from the Valhalla by the Pirates, it left behind a final message to the Federation, detailing its abduction. It was taken to Phaaze, where it was implanted into the planet and corrupted by Phazon. Seemingly as a result of Phaaze being a living organism, coupled with the Space Pirates' expertise in bio-technology, the organic supercomputer became symbiotically linked with the planet. Through the usage of AU 313 within the Sanctum, Dar