A ubiquitous device, found in ships, housing, transport platforms etc, characterized by a red, green or blue glow. Its magics seem to work by locally altering the force of gravity, aka the same force that makes a vessel with blasted engines crash down to Earth, or a kicked midget crash down the stairs. After some meditations on the nature of these magics, which involved smoking strange stuff while sitting inside an old engine and talking about arcane subjects while wearing next to nothing, we feel we have a much better understanding of the machine-spirits that make them work. Also, a cryptic message for you: 'Don't Stand On Lifters During Takeoff'.