Magic Forums

I have asked many people about black magic or dark magic,and the only answears i get is that black magic is all about Intend,Focuse,and Will.
But i dont quite understand this is that why isnt there any rituals or spells that are associated to black magic,like for example Circle casting only darker,or a simmilar ritual like the LBRP ritual,but only darker.
The only spells and rituals i find about black magic is related to satanism,why is that?