Deathsmiths of Goth

The Deathsmiths of Goth were expert weapons designers, were once more feared than the Daleks. The Daleks acquired weapons from them during their battle against the Time Lords in the Time War.

On their home planet of Goth, they created a superweapon known as the Apocalypse Device, however, this creation of theirs went out of control and began killing them. In an effort to contain this weapon, the Deathsmiths destroyed all starships on the planet leaving the Apocalypse Device stranded on Goth where it remained among the ruins. (DW: Black Legacy)

Behind the Scenes
The Deathsmiths of Goth first featured in DWM/Doctor Who Weekly 35 - 38 comic entitled Black Legacy.