 When the Manhunters were replaced by the Green Lantern Corps, they retreated to Biot, their homeworld in Sector 3601, an uncharted area of space incapable of sustaining organic life.Hank Henshaw, the Cyborg Superman, came to Biot and became the Manhunters' new Grandmaster.He used his mastery over machinery and Kryptonian technology to upgrade the Manhunters with organic enhancements, resulting behavioral developments such as emotions.