Mummy (The Rings of Akhaten)
From Tardis Wiki, the free Doctor Who reference
The Mummy was an alien of an unknown species that had rested in the Pyramid of the Rings of Akhaten for several millennia. It served as the "alarm clock" for Akhaten, causing the parasite god to wake up if the Queen of Years refused to be sacrificed. (TV: The Rings of Akhaten)