Pour your intent into the object and then give it to them. It's really that simple. If you want some grand ritual you could add some herbs that could cause your desired intent, such as poison ivy to cause them a rash, then make up a chant to speak over it. Use your imagination a bit. Spells often work better when they are personal ;)
By: WhiteRav3n / Knowledgeable Aug 14, 2013
Post # 4
Blessings and curses are performed the exact same way. The same way someone can bless, they may also curse. Yes, you can curse someone this way. In fact, it is believed that by giving someone a gift with magick on it, if it is accepted, then the person inadvertently accepts the magick on it as well. So by giving them a gift with a curse on it, they accept the curse when they accept the gift, and make it that much easier to get under their natural defenses. Next time someone offers you a cookie, think twice before eating it! Do you trust that person? I never accept anything from anyone unless I know them well and trust that they would invite no harm to come to me.