A month later, Samus finds out that Dark Samus' Phazon based attacks have partially corrupted her. She, along with the other bounty hunters, are fitted with Phazon Enhancement Devices (PED) which allows her to use the Phazon within her. She then finds out that her fellow bounty hunters have gone missing. Samus goes to several planets named Bryyo, Elysia, and the Pirate Homeworld, where she finds that the inhabitants are all slowly being corrupted by the Phazon Leviathans. On these planets, Samus must fight one of the corrupted hunters and the guardian of the Leviathan. After doing that, she learns of the Phazon homeworld, Phaaze.