Mastodon is anything but your typical heavy metal band. While they know their way around sludgy guitar riffs, the group has shown they are not content to confine themselves to any one space. The band reaches into the farthest depths of heavy metal and mixes in a healthy dose of progressive influences, all of which helps solidify them as one of the genre’s best bands. Their ferocious, unrelenting approach to making music is alive and well on Once More ‘Round The Sun and is best enjoyed on tracks like “Chimes At Midnight,” “Tread Lightly,” “The Motherload,” and “Halloween.”