Weeping Angel (Hell Bent)
From Tardis Wiki, the free Doctor Who reference
A Weeping Angel came to Gallifrey to steal information from the Matrix (TV: Hell Bent) It was trapped in the Cloisters by Fibre-optic cables and later used by the Matrix in an attempt to attack Clara, but she escaped. (TV: Hell Bent)
Later, after the Spy Master had brought Gallifrey to ruin thanks to learning about the Timeless Child, General Ko Sharmus destroyed all organic life still on Gallifrey with the death particle. (TV: The Timeless Children)
