Death whip

The Sycorax whip was a weapon wielded by Fadros Pallujikaa.

Properties
The Sycorax whip was basically a brown rope with a handle housing the micro-fusion generator. It would typically kill by lashing the end at a victim's neck. During this process, the rope would illuminate blue and show the victims bones slightly in the same color, similar to a Dalek's death ray. This destroyed all cells in the human body as well as disintegrating clothes, leaving only burned bones behind. (TV: The Christmas Invasion)

History
During the Sycorax invasion of Earth on Christmas 2006, Fadros used his weapon to murder Daniel Llewellyn and Richard Blake who were part of a delegation of humans he had teleported aboard his ship. He later attempted to use the whip against the newly regenerated Tenth Doctor who had emerged from the TARDIS, only for the Doctor to grab his whip and swiftly disarm him. (TV: The Christmas Invasion)