What created the Black Wind in the Ways?
I have no idea.
I believe Robert Jordan may have answered some questions about this at certain times, so if you look at the fan archives of questions, people have asked a lot of questions about this one, you may be able to get some clues there.
RJ said that the Black Wind (Machin Shin) grew in the Ways like a parasite as a result of the taint on saidin .
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