>The solar plexus literally has power to create such electric that it will create fire and can kill a human by touch alone---thus the VOO DOO doctor put fear in the neighbors of villages that captured them
That is the Lower Dan Tien (LDT). There are exercises to empower it and it can generate an electrical shock, but probably not great enough to kill someone.
There are however, other practices that build upon the development of the LDT that can be used for lethal purposes with never laying a hand on someone.
>the slave may learn how to create his body into a voo doo killing machine that can kill by just touching your enemy with your finger...
Correct. But one needs to develop a lot of internal power, and have the will.