Black magic is practiced everywhere in the world today. Everybody in the world is doing black magic. Black magic is very powerful. In astrology sometimes karakatwa plays a vital role. Moon is for mind and always Saturn and Kethu work against the principle of mind. Reason is that Saturn is the slowest planet whereas Moon is fastest; Kethu is for Moksha or withdrawal from these worldly ties whereas Moon is for indulging into this world. Whenever these planets connect with 6-8-12 houses there may be psychological disorders. It is said that Kethu afflicting Moon may cause haunting.