Donna I have come across a very old spell that is supposed to cause two souls to merge and swap if necessary.
At midnight, during the first night of a new moon. And it MUST BE RAINING! Spread the following herb in a circle: lavender, bay leaves and dill seed. Light 5 candles, and place them around the herb circle. Turn around clockwise 13 times very slowly. Picture in your mind the person who you wish to merge (then swap) bodies with. Concentrait very hard. Imagine yourself becoming that person. Chant: I am (your name), you are (their name) , you are ( your name), I am (the other person's name). Repeat the chant 13 times.
This spell will need to be repeated several times. But only once per moon cycle.
I hope this spell works for you. Blessings, Hecate_Maat
Reg your question I honestly am not sure right now, as I have not done that, and do not know anyone right now who has. Id think youd use or go into medition- trance and do it in a circle. Make sure your very specific.