This is a jinxing powder mixture. 
If your enemy really deserse whats coming to them then theres no reason why you can't just even the playing field. Honestly this will help you feel empowered and feel like your finally taking control of whatever the situation is. All you got to say is " They Should'na Done It"
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There is a little note card attached to the jar that explains different ways of using this. 
This is Dark Magic so if your comfortable using this then please do some type of protection ritual before using this just to be safe.