if it's somehow an apocalyptic, fiery death, then
Pendulous Skin from
Mastodon. i'd choose it not just cause it's a beautiful song, but also for how it really lets you sit back and take it all in, as well as an almost shining and fiery feel from the guitars that give you the feeling of setting out on another plane of existence. really, it's a slow and sad feeling song that's at the end of an album about a journey, and at the end of the journey the person is so worn down and can finally rest. that's what it says to me.
there aren't any youtube vids cause of copyright stuff, but if you look at it
here on their myspace as the last song