Korath first appeared in Quasar #32 (March 1992), and was created by Mark Gruenwald and Greg Capullo. It was revealed that Korath-Thak was the lead designer of the project that created the Pursuer, a cockroach from Earth modified by Kree geneticists, which first appeared in Inhumans #11 (June 1977), fifteen years before Korath himself made his first appearance.
He was a member of the Starforce team during the Operation Galactic Storm storyline. He turned the experiments on himself and it give him superpowers, including the ability to follow the brainwaves of his targets. He later reunited with his old team mate Ronan the Accuser, as part of the Annihilation event.