Sai Tok
this was the more dangerous of the "marks of contact" defined by the Jedi Knights of the Old Republic, both for the Jedi and for their opponent. Literally, sai tok meant the bisection of an opponent's body. This was considered a form of butchery by many Jedi Masters, and represented a Sith-like desire to utterly destroy an opponent. It was to be used on in the most extreme situations, and required a Jedi to meditate on the necessity of avoiding it in the future.