Anaal Nathrakh: Sitting on the Proper Side of Intensity

I'm listening to Anaal Nathrakh right now for the first time (after reading a review snippet that sold the band enough to catch my attention) and it's intense. The first song went from a nice black metal texture to grindcore to a passage with "Thus Spake the Nightspirit"-type vocals and back again in a matter of minutes and the next few songs have had the same level of agility. It's rare that an album is so effectively brutal and evil-sounding that it makes me feel physically uncomfortable, but these guys have done the trick. Hats off to them: I'm loving it.