The Mind Extractor was a device designed by Evil Makes-Things to scan the prime multiverse and switch the minds of people in the prime and mirror multiverses. When in effect, the machine generated what looked to be a mirror on the wall near its target. Fortunately, the process was reversible, and the machine was destroyed by Nendil Morifëa.
Though the Mind Extractor was never described in detail, it was seen in use in "Your in the Matrix, Charlie Brown!" and "Tinco Division," during which it was destroyed after the prime multiverse agents were sent home.