Foretold

The myth of the Foretold grew up around what the Twelfth Doctor identified as an "ancient soldier being driven by malfunctioning tech".

The soldier was fitted with "state of the art phase camouflage" and a "personal teleporter". After he was injured, the technology within him kept him alive but also forced him to continue the "war" by killing others for sustenance. He remained within the vicinity of a "scroll", which was in fact the flag under which he had fought. His time-withered form, wrapped in the bandages originally used to heal his wounds, was eventually confused for a mummy and came to be referred to as "the Foretold".

The myth of the Foretold grew up around what the Twelfth Doctor identified as an "ancient soldier being driven by malfunctioning tech".

The soldier was fitted with "state of the art phase camouflage" and a "personal teleporter". After he was injured, the technology within him kept him alive but also forced him to continue the "war" by killing others for sustenance. He remained within the vicinity of a "scroll", which was in fact the flag under which he had fought. His time-withered form, wrapped in the bandages originally used to heal his wounds, was eventually confused for a mummy and came to be referred to as "the Foretold".

The Foretold killed his victims by moving them out of phase, synchronising them with his own phase level. This process took exactly 66 seconds, during which time the victim — and only the victim — could see and interact with him. Once synchronised, the Foretold placed his hands on the victim's temples and drained their energy, causing them to drop dead of an apparent heart attack. Driven by some remaining scrap of the soldier's mind, the Foretold selected his victims based on physical and mental illness, preying on the weakest first so that the strong could survive.