As salamu allaiqum,
These devils belong to the group of the jinns the sole aim of which is to harass people. They are very huge and powerful and are very old. If they get agitated, they can cause a lot of loss as they are very destructive by nature. Allah has assigned a lot of power to them and they are very horrifying looking with big teeth and smoke emanating from their nose. They live in deserted places and mountain regions and can be brought under control by the magician with the help of some specific mantras.
When the magician orders them, they come out of their hideouts and attack the victim in a brutal manner, causing him a lot of pain. These are the signs of a person being under the shadow of these devils:
1 An elongated shadow is seen by the victim which may be of around 12-20 feet.
3 A burning sensation in the body
4 Constant illness
1 The victim should read Ayatal Kursi 150 times and blow over his body every night.
2 Read Surah Hood ,verse no.119, 100 times after every namaz.
3 Read Surah Naas 300 times and blow it on water, which should be consumed 5 times daily.
4 Read Surah Al alaf ya after fajar namaz daily.
5 Read lahol wala quwata illa bila hil ali ul azeem as much as you can.
Inshallah the evil effects of this devil may get over.
Remember me in your prayers,