Subject 4D668493X was a highly volatile bioengineered creature created by Imperial scientists. It was part of a program to create a creature that could aid Imperial officers in their efforts to track down and apprehend criminals. Pale-skinned, 4D668493X possessed razor-sharp teeth and claws and a whiplike tail. In addition to giving the beast balance while scaling walls, the tail also served as a lethally efficient slicing weapon.