In Galations 5, one of the works of the flesh is "witchcraft" ...
God showed me some of the ways witchcraft is practiced today, in 2017.
Basically witchcraft is doing something to try to bring good luck upon yourself or trying to put an "hex" (bad luck) on another. (superstitions)
Athletes often cross themselves thinking to bless themselves ... This is witchcraft based on religous superstition. It has no basis in Bible. There is no such thing in Bible. It is simply conjuring of man.
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We see sports fans do this as they do little signals with their hands, often thinking some power comes from this. Usually they do these signals in mass, with many joining their "curse" against the opponent team.
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We see a form of witchcraft when we see people clicking drinking glasses together, drinking toasts to other people, thinking to bring good luck. (thinking power in themselves and not in God ... no consideration at all of God ... just thinking they can bless of their own will and flesh.)
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Certainly we do not want to join anyone in such things as this. I've often been at a table where women would begin clicking their drink glass together. I just sat there, saying nothing, but making no effort toward lifting my glass and they would just ignore me when I didn't join them. If forced, I would say this is simply witchcraft.
Another witchcraft is the observations of various superstitions of men.
There have been times when a woman said to me, "Things always happen in threes." I replied, "That's not in the Bible. That's not true." (With that she stopped speaking.)
Another superstition of man has to do with believing certain numbers, such as 13, are bad luck. Sometimes buildings skip the #13 in numbering floors of buildings. Witchcraft.
Galatians 5:19-21 ... Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God.