Crack the Skye (15th Anniversary Deluxe Edition) 15th Anniversary Deluxe Edition of Mastodon's fourth studio album, Crack the Skye, on 2LP Sky Blue Vinyl. Disc 1 is the original album remastered while Disc 2, Crack the Skye: The Score, features instrumental versions of each track. Originally released in March 2009, the album features "Oblivion", "Divinations" "The Last Baron" and more.