Matter condensation

Matter condensation was a technique used by the Master to kill a living being by shrinking it. According to the Fourth Doctor, his nemesis had picked up the technique "somewhere on his travels", and this way was a "nasty sort of death". (TV: The Deadly Assassin) The Master employed a Tissue Compression Eliminator to achieve the process. (TV: Terror of the Autons et al.)


 * Unlike it, other known processes of miniaturisation caused no harm to living beings, effecting just the size.