Necromancy is the occult practice of summoning spirits of the dead and the most popular ritual comes from French occultist Elphas Lévi’s book Transcendental Magic: Its Doctrine and Ritual.
The process of summoning a spirit of the dead takes about a month, but the first step is to redecorate a room in your home to the spirits liking. Place in the room personal artifacts of the deceased. Central to the redecorating is a portrait or photograph of the person, which is covered with white cloth at all times. On the floor in front of the image of the deceased should be a magic circle and triangle of arts, as described in the grimoire The Goetia. The room should be completed two weeks prior to a date that was special to the deceased, such as their birthday or anniversary.
Next is obtaining and mixing the ingredients for the incense. The most commonly used are clove (Syzygium aromaticum), sandalwood (Santalum), dittany of Crete (Origanum dictamnus), wormwood (Artemisia absinthium), frankincense (Boswellia) and myrrh (Commiphora). This mixture will be burned on charcoal in a cast iron pot each time you exit the room.
Each day for two weeks, the practitioner follows a strict set of guidelines, including fasting, in order to achieve success. At the same time every evening, walk into the room with only a lit taper candle. Set it on the floor and surround the deceased’s portrait/photograph with their favorite flowers; sweep old flowers away. Sit with your back to the lit taper and eat in silence without looking up. After you have eaten, fumigate the room with incense and then walk out backwards with the taper.
On the special evening at the same time as every night for the past two weeks, it is finally time to summon the deceased person’s spirit after your dinner for two. Dress in white and take a loaf of bread, two glasses of wine and the lit taper into the room with you on a platter. Also, bring dried cypress (Cupressaceae) wood. Set half of the loaf and a glass of wine in front of the portrait/photograph and the other half of bread and glass of wine in front of you. Set the taper behind you. Again, eat in silence and do not look up. When you have finished with your bread and wine, place the cypress in the cast iron pot and light it on fire. Extinguish your taper. Throw seven pinches of incense into the fire, each time calling out the name of the spirit that is to be summoned. When the flames finally go out, throw a final pinch of incense on the ash and invoke the resurrection deity of your choice (Jesus, Osiris, Dionysus, Adonis, Persephone, Attis, etc.), describing who you are, who you wish to contact and why. Cover your eyes and call the person’s name six times.
In occult lore, this ritual will allow anyone to see and even speak to a deceased person’s spirit.