The Eradicator is a powerful Kryptonian artifact and character in the Superman series. Initially a device created to preserve Kryptonian culture, it gained sentience and sought to reshape Earth into a new Krypton. Throughout the series, it becomes a complex character with shifting allegiances, sometimes portrayed as an ally and other times as an adversary to Superman. The Eradicator's role evolves, often emphasizing themes of identity, belonging, and the balance between preservation and progress in the Superman storyline.