Skogyr's 2007 album Rainchants is actually really good. It's atmospheric sort of nature-based black metal in the vein of Wolves in the Throne Room, Drudkh, or Hate Forest -- but they are purely instrumental. The tracks are simply Chant I through Chant IV, with Chant IV being considerably better than the other 3. I looked it up later and found that 1-3 are re-recorded songs from an older demo and 4 is the newest one, so I guess that makes sense.
The middle two songs could be about 4 or 5 minutes shorter and the album would be just as good, if not better. Oddly it ends with a cover of the Silent Hill theme, which is interesting but kind of random for an album that seems to put such emphasis on the natural world.
Definitely check this one out if you are into that atmospheric black metal style, you'll be glad you did.