But power for its own sake is self defeating. The power which magick can give you should not be your primary reason for studying it. There are many cults and sects which profess their own views, but there are really few differences between them. One popular area in the occult today is witchcraft. This is far removed from the cliche of devil worship.
Witchcraft has much in common with magick.
Alchemy also has much in common with magick. It's heritage comes from the middle ages. Alchemy fathered chemistry and the physical sciences. But the avowed purpose of alchemy, turning lead into gold, is too limiting to be called magick. Sometimes the goal of alchemy is interpreted in another way, as the transformation of man into a spiritual being.