Start with a clean lamp - a new one is best - but a used one is fine as long as it has been thoroughly cleansed.
At the bottom of the lamp place a magnet and a personal object from the person the lamp is intended for or their name written on parchment paper cut in the form of a cross. Pour in two ounces of virgin olive oil that has been thoroughly infused with two tablespoons of the following mixture of carnation petals, anise seed, and cinnamon: 2 parts carnation petals, 1 part anise, and 1 part cinnamon.
Now add a small piece of galangal root and 1/2 teaspoon of each of the following: yellow dock, snake root, carnation, and five-finger grass.
Fill the rest of the way with your basic fuel mixture. Light the lamp and recite a prayer to Saint Basil, or whatever deity you wish to invoke for justice and/or mercy.
Once it is lit, the flame must not be extinguished until the goal is accomplished. Each day at the same time, your desire should be restated and the prayer recited while turning the lamp in a clockwise direction (to get the ingredients moving), and the lamp should be refueled if necessary.
Note: If some of the ingredients seem difficult to acquire, feel free to use any herbs and oils that are useful in spells for justice. For example, seeds from a green (sweet) pepper can be substituted for galangal root, basil can be substituted for snake root, etc..