Re: black magic
Surah Falaq
Period of Revelation Hadrat Hasan Basri, 'Ikrimah, 'Ata' and Jabir bin Zaid say that these Surahs are Makki. A tradition from Hadrat 'Abdullah bin 'Abbas also supports the same view. However, according to another tradition from him, it is Madani and the same view is held also by Hadrat 'Abdullah bin Zubair and Qatadah.
good, so nobody knows when it happened. Yet they are sure it happened.
Sura Falaq could very well be asking believers to not get into this black magic stuff or believe in it. yet bcoz of it alone, people believe in this sort of things, that otherwise cannot be proven.