I don't know what you're talking about. Brujeria are great!
But in all seriousness, you need to have solid mental fortitude to invite dark forces. A will that can overcome any evil that may spew forth. I've dabbled in exploring the dark side, and only did so with almost complete confidence that it would not change me (emphasis on almost). I was even granted an audience with the King ov Demons himself. Only way i kept my sanity in check was remembering my purpose: to understand the duality of good and evil. With this in mind, it's important to merely observe, and not to partake.
To truly know good and evil, it requires contemplation of the opposite force.
"A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools."