This spell isn’t meant to be used for vengeful or frivolous purposes but rather as a final resort, since it not only asks a powerful deity for help but also seeks to neutralize harm caused by the wrongdoer.
To begin, place three unlit white candles on an altar table around an image of Hecate (or three keys) and a bulb of garlic. Close your eyes and meditate on Hecate until you can feel her presence. When you feel her near, safely light the candles in her honor and plead your case. Tell her why you need her help. Don’t declare what type of justice you wish to befall the wrongdoer; that’s her decision. Simply tell her what happened and then recite this spell:
With thanks and honor, I ask this
Extinguish the candles and bury the garlic.