Deathsmiths of Goth

The Deathsmiths of Goth, expert weapons designers, were once more feared than the Daleks.

On their home planet of Goth, they created a superweapon known as the Apocalypse Device, but this creation went out of control and began killing them. To contain this weapon, the Deathsmiths destroyed all starships on the planet, leaving the Apocalypse Device stranded on Goth among the ruins. (COMIC: Black Legacy)

Behind the scenes
According to REF: Doctor Who: Monsters and Villains, a non-narrative source, in the Fifth Calendar Year of 111222/99967, to alleviate the Earth's terrible debts, Brazil and it's five millions occupants was sold to The Deathsmiths of Goth where they were experimented on in bizarre and terrible ways.