The tracking-knife was a tool which could cut into a living thing's timeline, allowing its user to dissect the subjects past, presents, and possible futures. (AUDIO: The Eleven Day Empire) It was created by Morlock. (PROSE: The Book of the War)

While most members of Faction Paradox used tracking-knives for autopsy, Tonton Macoute decided to experiment with a knife by using it on a living subject: Andraiz. Macoute cut through Andraiz's index finger, causing Andraiz to experience countless possible events which could have occurred with the finger. (PROSE: Tonton Macoute)

Morlock used a tracking-knife to examine the corpse of Vlad Tepes. (PROSE: A Bloody (And Public) Domaine) He conducted an autopsy on the corpse of a South American missing link on the day of the Sontaran invasion of the Eleven-Day Empire. Justine McManus interrupted the autopsy and told Morlock about the Sontarans. (AUDIO: The Eleven Day Empire)

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