Take graveyard dirt, take snail dust, take snake sheds, take red pepper. Dry and grind. This is your dust.
Go to the house of the person you want dead. Sprinkle your dust in the hollow crotch of his tree, or in anything that he passes every day. Mix it with his dirt so he cannot detect it. Sprinkle in the places that he sleeps.
It is important to walk backwards as you do this, sprinkling in front of you.
Never use this powder unless you are sure it cannot touch you. It is death to tread on your own dust.