Sanukuma

The Sanukuma was a primordial race that roamed the universe during its early times. Using their vessels called SporeShips they have created and destroyed lives before they were lost in time. After billions of years, they have returned and planned to wipe the universe clean for them to start over with their reign using their ships to destroy inhabited planet. However, their plan was stopped by the Eighth Doctor with the help of River Song by sending them back to the beginning of the universe. (AUDIO: The Rulers of the Universe)