Do Christians believe in witchcraft and the occult?

Do Christians believe that people can tap into supernatural powers through the practice of [witchcraft](https://en.wikipedia.org/wiki/Witchcraft) and [the occult](https://en.wikipedia.org/wiki/Occult) ? I'm aware that there are passages in the Bible that prohibit messing around with the dark arts, but I'm not sure if these practices are prohibited because they would be a waste of time (i.e. they don't work) or because they are dangerous (i.e. they do work). Do Christians believe in witchcraft and the occult? Yes? No? Why? Does the answer depend on the denomination? Are there denominations that believe in their existence and other denominations that don't?