Ultramancer

From Tardis Wiki, the free Doctor Who reference

A Ultramancer was a metallic humanoid species originating from one of the seven planets of the Sun-singers of Akhet. At least one member of this species attended the Festival of Offerings at the pyramid of the rings of Akhaten at least once. (TV: The Rings of Akhaten) 

Behind the Scenes

This species may be a reference to the Japanese television series Ultraman.