Does anyone know the best religious scholars or the most Islamic list of steps to take when you suspect a loved one's rapidly progressing illness is because of black magic? What are the list of steps you can take to do away with the black magic?
Assess symptoms of magic, you can find many details about that on the internet and you don;t only have to restrict yourself to Muslim scholars on that as most of them are not well experienced in the matter.
Assess what kind of magic you might be dealing with, not all magic is black nor can all of it do great harm.
Recite Quran often, keep your home and body and that of the affected person clean as per Islamic code. Make them pray 5 times on time, and recite the three Surahs, Surah Ikhlas, Surah Nas, and Surah Falaq more often and specially at the start and end of the day.
Recite Ayat al Qursi as well, and remember this might also be due to the evil eye.
Then you can also look up the ways of doing Ruqyah, and how to combat the affects of magic.
i'm no expert but I have researched and studied a great deal on Wiccans and spell casting back in my early days out of curiosity, and a great deal of research on types of Magic.
So I'm not saying I can definitely help here, but if you need and can explain details, I might be able to put you in the right direction.
And remember above all, no thing can ever befall anyone except what Allah permits. He is the master of all that is. So pray to Him and improve your relationship with Him and He will guide you towards what needs to be done.
Som
There is nothing called shirk.
To claim gods beside The Almighty Creator of everything, is called shirk in Arabic and is not related to the English word shirk.
If you are a Hindu, you might not understand, and yet Islamic way does not depend on your understanding or lack of it.
And to involve oneself in shirk is to dive into filth and surround ones' soul with filth and this crime is unlike any other as the crime is being done toward The Creator Himself. So its punishment is also severe.