So I was made a Ghost.
My brain and spinal cord were rolled up and moved into a cleaned-out chest cavity. My circulatory system was wrapped into a complex mass around the brain pan. The Ghosts built a new metabolic system, far more efficient than the old and capable of working off direct radiative input. New eyes, capable of working in spectral regions well beyond the human range, were bolted into my skull; and I was given Ghost 'muscles' — a tiny antigravity drive and compact actuator motors.
At last I was dipped in something like hot mercury.
-Vacuum Diagrams, "Planck Zero"