Why 6 minutes? Seems kinda arbitrary. Anyway, all of Slayed Necros' recs are fantastic. I'll also add:
More The Chasm, because everyone needs more of this band in their lives. Also this one is over 6 minutes and instrumental.
I don't know how you feel about black metal, but it's generally easier to find long songs in that genre than death metal.
Let us know if you like any of these and we can give you more.
Never heard anything by this band before. This seemed quite cool on first listen!
Gorguts come to mind. Their last album Colored Sands was amazing, and they released an EP earlier this year that consists of one 30 minute song. Pretty atmospheric and technical, but not overproduced like so much technical death metal is these days. They're a great example of a band who just keep getting better as they age, in my opinion.
one of my favourite songs from Colored Sands. One of the easier songs to get into at first, also check out the title track and Le Toit Du Monde