Their Death…Our Freedom is an album by Oak that was released on Blood & Soil Productions in 2005. This album is folk NSBM.
The folk part means there is flute accompanying the guitar. Flute is one of the least menacing instruments (up there with kazoo and recorder) but there are bands that decide to incorporate it into their music, and it most definitely works. I actually love it when black metal bands use flutes. It really creates an interesting vibe and sounds good. The flute goes along with the black metal riffs. This album is pretty slow and has a nice level of rawness to it. Also, one of the tracks sounds like vaporwave lol
Listen to some tracks from this awesome album below