15th Anniversary Deluxe Limited Edition of Mastodon's fourth studio album, Crack the Skye, on 2CD + Blu-ray. Disc 1 is the original album remastered while Disc 2, Crack the Skye: The Score, features instrumental versions of each track. The Blu-ray disc includes Crack the Skye: 10th Anniversary Animations, Crack the Skye: The Movie & The Making of Crack the Skye. The box also includes a Mastodon sheet of stamps and 24-page booklet. Originally released in March 2009, the album features "Oblivion", "Divinations" "The Last Baron" and more.