Demonic Revenge

Like I said this is an extremely dangerous spell. Anything that involves demonic presence are better to be keep hidden. I recommend you to use trick spells when things haven't go serious. This spell is for the most desperate moment. Reconsider if you don't want to throw yourself at a danger spot. I also need to tell you that even the slightest mistake during the ritual will cause harm to your life. If you are an advanced or expert caster then it is fine. Learn all the basics about summoning ritual before practice this dark magic.

Ok. Now, ready, place the candles in there rightful places, and go to your place. Spend a minute to concentrate, gather all the hateful feeling you save for this moment. Place the object in the middle of the triangle. Don't forget to light up the candels. The object i recommend is something you can hide (a key, a teddybear...) or anything that you think is the best. Get ready and read out loud

" I gather all powerful elements of the universe, gather their power to perform this spell. I now contact the dark side by using my wholesome magic! I here by open a portal to hell, call help from a diabolical and hateful demon, you can now pass the portal!" Don't stop or things will get worse for you. "Listen me clearly, I've sent you here to help me punish a living, that has harmed me. You can unleash your power of evil upon that person with my help. You can never harm me but harm the enemy that i told you to. By possessing that object I chosen, your evil deeds will be accepted as our curse fall upon our enemy. So mote it be!"

Important: Clean the circle right after you finish the ceremony to keep yourself safe. Recommend a protection spell for you before perform summoning spell to avoid any possession from the demon's bad intention. Creative is the key to success in spell casting.
If you can then hide the object inside the enemy's house immediately. Or consider it as a fake 'peace offering'.