The only album that's ever scared me was English Heretic - 2006 Annual, specifically the last track, 'Enter the Mithraic Stargate', which is basically dark ambience mixed with field recordings of an esoteric thelemite ritual. High school satanism, this shit ain't. I had to turn it off halfway through the first time I heard it, go outside, smoke like, four cigarettes, then come back in and listen to it again. I felt like exorcising my speaker system afterwards.