@chaurdy9
brother alam786 is correct ,
and yes , shayateen are EVIL jinns , aka daemons , its a terms reffered to the evil jinnat .
about the iblees thing ,
my bro , iblees roz samandar per apna takht lagata hai , and all the shayateen report to him that what they did that day , and then they get their rewards . its mentioned in a hadith very clearly , i can try and find u a reference if you insist .
all the shayateen serve iblees's agenda , and participate on various scales to lure mankind into evil .
black magic is performed by people . yes .
those rituals you see are napaaak rituals to please IBLEES .
and then on the order of iblees , a shaitaan /evil jinn surrenders to you , and does all the evil work for you .
this is how it works.