Warpsmith

The Warpsmiths, also known as Warpwrights or Phaidonians were a time-active species from the planet Phaidon and members of the Temporal Powers. (AUDIO: Appropriation) The Warpsmiths were seen as a credible threat to the Braxiatel Collection. (PROSE: Parallel Lives)

History
Warpwright Ambassador Kalbez orchestrated a plot to assassinate the President of Phaidon and blame a terrorist attack on Gallifrey on the Monan Host, in order to form an alliance between the Warpwrights and the Time Lords. However, this was averted after Romana II altered the timeline. (AUDIO: Enemy Lines)

Most of the nine-billion population of Phaidon was exterminated by the Daleks at the onset of the Last Great Time War, with only five thousand survivors taking refuge on Gallifrey. (AUDIO: Celestial Intervention) This, along with the extermination of the Nekkistani, Sunari and Monans, led to Gallifrey formally declaring war against the Daleks. (AUDIO: Desperate Measures)

Behind the scenes
The Warpsmiths of Phaidon originated as an opponent of the powerful Chronarchy in Alan Moore's comics in issue 4 of  magazine. Moore had previously identified "Chronarch" as a term for Time Lords in his Doctor Who Magazine story 4-D War.