The Ultramancers are a sapient alien species known to have been present at the Festival of Offerings on the rings of Akhaten.
They are highly robotic in appearance, and almost certainly are. They look to be made of a dull, bronze-like metal, with numerous metal tubes on their back. Their heads are simple and consist of two rods jutting from the top of their heads, timid red eyes, and two unexplainable 'plates' where their ears should be.
- Doctor Who, Series 7 Part 2 episode 2 - The Rings of Akhaten