i understand they are one of the last people to retain ancient knowledge like that but they altered much of it and dont talk about it openly but how much of their knowledge is still practiced and uncorrupted? does anyone know?

I'm not entirely certain but from what I know is that yes they do practice spiritually empowerment and an ancient form of Satanism in utmost secrecy. I do believe they probably have many advanced practices unavailable to the internet and world unless you are in their circle.