saunan tonttu seems to be a concept band whose thing is an anti-gnome agenda. gnomes are those little mythical people with red hats who fix your shoes or something. this song 'thus spake gnomethustra' is some moody, atmospheric classical string-type music with a story spoken over it in a creepy gravelly voice. it's not in english, but i'm assuming it's about gnomes, and that it doesn't paint them in a positive light.
towards the end, the song becomes sort-of a dark metal chant with guitars and drums joining the strings. i'm not sure i fully understand what's going on here.
get it here. you can listen to more anti-gnome propaganda on their last album 'nekrognomekon'.