Kro'ka

Kro'ka was a being that controlled the various zones within the Divergent Universe. (BFA: The Creed of the Kromon) He was thus occasionally called the "interzone guardian" by the Eighth Doctor. (BFA: The Last) Kro'ka was later revealed to be a slave of Rassilon. (BFA: Caerdroia)

Appearance
The Kro'ka's appearance was entirely controlled by Rassilon. At one point, the Kro'ka had two hands. (BFA: The Next Life)