Moloko

Think of the person or thing you want to curse. Visualize evil power flowing from the earth through your body and out your hands, in essence forming a psi ball of negative energy. As you shape the energies, compacting them in a ball, recite the following incantation three times: "Bhravo shella makasa, moshoko dom matata".

When you feel satisfied, feel a shockwave of immense supernatural power drive through your body and channel the negative energies and absorb and draw towards you with your attraction force. Visualize the shockwave blast violently out your hands, releasing foul evil energy which is absorbed into the ball. finally, guide the ball into a jar and close the lid tight. Break the jar on your opponents doorstep so that negative curses shall haunt your opponent.

Variation
First put something cool in the jar and give it to your victim as a gift. When they open the jar they will breathe in negative air. This will get absorbed through the lungs and into the bloodstream which will build up in the body as they absorb negative energy. In effect this will turn them into a living filter that absorbs negative energy and will increase over the course of many years