Goth (planet)
Goth was the bleak planet of the Deathsmiths. It held their weapons cache. It included their ultimate weapon, the Apocalypse Device. Long after the Deathsmiths themselves seemed to have departed, a squad of Cybermen landed there. After the Apocalypse Device had, in effect, dispatched them (the Cyber-Leader of the squad, Maxel, destroying himself rather than re-locating the device off-world), a group of Sontarans arrived. (COMIC: Black Legacy)
Shortly after their creation, the New Dalek Paradigm made use of Goth's weapon production capabilities to quickly build their empire. (PROSE: Dalek: The Astounding Untold History of the Greatest Enemies of the Universe)