A/N - Before you read this ,let me clear out this article is just for fun since Necromancy is such a buzz in mordern T.V . Shows of Netflix . I have no intent of promomting Necromancy.
Necromancy is the practice of magic involving resurrection of the dead. It is one of the most darkest bit of magic . Magic we know widely, courtesy of the Harry Potter is pure and light hearted . The dark Arts in the serries skips discussing about this stuff noticing the amount of its sister nature. Magic in all properness has dark sister variants too.
Magic inadvertently is neither light nor dark. It has no colour no type. It is neutral. However our association with it and our purpose makes it it's metaphorical darkness and lightness. Goodness or Badness.
Channeling magic for our own selfish aids resulting in the potential harm of others is dark magic. Eg. Voddoo dolls,hand of glory ,Gris Gris bags,etc. People who dabble in the dark Arts know the allure of dark magic and it's power far surpasses the allure of the good magic.
Imagine someone who you are very close to dies .what would you do to get them back if it were possible. See the allure.
Practicing Necromancy is forbidden and frowned upon by witch covens and can result in the banishment and punishment from the Church if Satan .
First you draw a pentagram with salt . Pentagram being the symbolism of the devil and the salt being the binding agent.
You will need a part of the person you want to resurect (nails, hair ,etc,) and will have to place it at the center of the pentagram. You need to find four other powerful witches to stand at the ends of the pentagram and the gruesome part awaits. Nature always demands balance since you are trying to bring a dead person back to life you have to send someone to the dead realm. Yeah. You need to sacrifice another person . After you find a scrapgoat for sacrifice you need to do a complicated spell which I don't know and kill that person with your bare hands.
After the completion of the spell you leave the body there . It takes one day for the blood from the body to seep to the soil and after nature absorbs the life it transfers it to the person to be resurected.
Somehow nature finds a wicked way to pay you back . In most or kind of all cases the person is never the same. They are emotionally damaged and recent you for bringing them back to life since they are constantly vulnerable to the souls in the mirror world. They are forever tormented. (Awful, isn't it)
The people we loose never come back to us .No form of magic can change that. Trying Necromancy us a very very bad idea, even if you had magical powers even then. Having blood on your hands ,what could be worse. We should learn to let things be the way they are and not try to disrupt the system . I wish my fav . fictional characters could understand that too.