Earth

Earth, within the Image Universe, is the setting of Invincible, the home of Mark Grayson and of his father Nolan, an alien from the planet Viltrum known as Omni-Man, Earth's most powerful superhero. Nolan was sent there to conquer it for the Viltrum Empire; after he kills the Guardians of the Globe he reveals this to Mark and tries to recruit him, but changed by the people of Earth and his son's love he leaves instead. The Viltrumites later appoint Mark as Earth's subjugator and warn that the planet will pay if he keeps defying the empire, Angstrom Levy attacks it with twenty alternate versions of Invincible, and the Flaxans invade it more than once. The Viltrumite War ends with Thragg's ultimatum that the surviving Viltrumites be allowed to breed with Earth's population.