The Reaper was one of two recovered "power cores" used by Observation Squadron 54 (VO54) in its exploration of alien spaceflight technology.  Descriptions from squadron survivors indicate it may be similar in nature to the TERMITE WINKLER artifact.

The Reaper was a faceted jade sphere the size of a baseball.

Like The Finger, The Reaper was sensitive to thoughts.  If someone concentrated on it, it would become weightless, immune to gravity.  Control systems were necessary for anything else.  VO54 developed up with a way to plug the item into a filtered EEG machine.  A human operator with good visualization skills and a way to enter REM sleep could generate a radius of antigravity effect, or could make it radiate, anything from gamma to high-frequency radio.  When it was radiating, it also generated was a continuous strong static at 575 megahertz - matching the WILDWOOD GROUSE signature.

At least four aircraft using The Finger and/or The Reaper for propulsion were flight-tested.

The Reaper's current whereabouts are unknown.