I know very little to nothing at all about magic or spell casting, nor does it interest me. There have been times in my life though, my days as an athiest, when out of curiosity and disbelief I would attempt to confer spirits or ghosts of some sort, for cheap thrills. It was in that time of my life that the strangest things happened to me with ghosts and such. All I know for certain is this, you get what you invite. Whether good or bad, positive or negative, you get what you ask for.