While most suspected ‘magical attacks’ are actually self-perpetuated, sometimes a negative person can really hook their bad attitude onto you – a bitter, miserly person who indulges in constant negative thinking will bathe themselves and the people around them in a pool of dull energy, or worse, someone who actively hates you (a jilted ex, a power-tripping boss, etc) and consistently sends anger and rage your way. In these cases, this classic reversal spell will take your attacker’s energy and flip it back on them.

Be sure that the negative energy you’re feeling is coming from an external source, otherwise the magic mirror will be powerless to help you. If your problem is actually rooted in one of your own energy blockages, you’ll need a healer since the mirror won’t be much use. 

• Cast a Magic Circle: The first step of any ritual – especially one for protection and reversal of spells – is to cast a magic circle. If you don’t know how, check out a simple example here. 
• Smudge Yourself: After cleansing your space by casting a magic circle, you’ll want to smudge yourself, probably with sage, tobacco or a feather. If you don’t know how to smudge, you can find that here. 
• Prepare the Mirror: Select a mirror that will fit in the window and won’t be needed for the duration of the spell. Smudge it with sage or incense to remove any existing energies attached to it and prepare it for your spell.  Set the mirror near a window by your bed, facing outside. 
• Imbue the Mirror with Intention: Until you imbue the mirror with your intention, it’s just a mirror. 
  Light a black candle and set it in front of the mirror. Aloud or softly, tell the mirror in your own words to, ‘reflect any negative energy that may be targeting you and send it back to its source‘, so that whoever broadcasts negativity to you will have it bounce back on them. Visualise the mirror reflecting energy, or if you’re not a visual person, you can create a short phrase that states your intention and then chant that repetitively. Do this for several minutes. You can combine both visualisation and chanting to occupy all the senses and completely engross you in your intent. 
• Charge the Mirror: After you’ve given the mirror its instructions, it needs some power to carry out its task. We can control energy with our attention and our breath. A combination of the two is even more effective. “Energy flows where attention goes” so fix your attention on the mirror with meditative absorption. With the mirror as the object of your meditation, it will naturally draw your energy to it. 
  To bring even more vital energy to the mirror, use your breath. Take a long deep breath through the nose, while visualizing your energy field absorbing free energy from all around you. Then, as you exhale long and full, visualize your breath blowing energy all over the mirror.  
  Gazing softly at the mirror for at least five to ten minutes while breathing deeply will charge the mirror nicely.

That’s it. Let the candle burn out on its own, and leave the mirror up for as long as you need to, recharging it on every New Moon.

When you no longer need the mirror, wait till the next Full Moon, and then bury it somewhere no one will disturb it. Alternatively, if you want to use the mirror again, you can smudge it with sage within a magic circle three days in a row, and it should be ready to re-purpose. But if someone really is intentionally cursing you, the burial method is preferred.