This post is going to be short, and there's a good reason for that.
That reason is The Hunter. Mastodon's newest is great, with a catchier edge to the proggier Mastodon. It's a showcase of so many types of songs, a rollercoaster ride of emotions, and yet it stays coherent. This is a genuinely fascinating album.
Seriously, listen to this album. The band have removed it from Youtube since the album's release (aaaaw), but trust me on this - it's amazing.
In fact, I'm going to go listen to it again. Fuck yeah!