Mastodon have never really done anything the "conventional" way. The Atlanta-based band formulated their own brand of highly-skilled hard rock over a decade ago when others were rehashing 80s metal, and went on to mastermind a string of complex concept albums while much of the music world was centered on making digestible singles. The fact that Mastodon has received an outpouring of critical kudos along with public praise from respected icons from Metallica to The Melvins, The Flaming Lips and CeeLo Green and back, they've been humbled by the magnitude of appreciation. But rather than taking time to revel, they prefer to focus their attention on pushing musical boundaries even deeper by exploring their own creative process to the fullest.

Opeth has spent over two decades steadily amassing a body of work that is at once possessed of a fervent and unrelenting devotion to aesthetic progression (and perfection) while simultaneously scaling the summits of power, mysticism and might aspired to by the group's hard rock forefathers in Sabbath, Purple and Zeppelin.
The band's roots in the doom-laden shade of occult-infused Scandinavian death metal and dark romanticism are undeniable and will never elicit apology.