"Leviathan" was followed by the 2006 release of "Call of the Mastodon", a remastered collection of the band's first nine songs, and a DVD of interviews and concert footage called "The Workhorse Chronicles" that includes material from the band's early days as a five-piece. The band has stated that they consider ""Call of the Mastodon"" to be their first studio album even though it was the third to be released. These two releases were the band's last for Relapse Records, as they would later go on to sign with Warner Bros. Mastodon also recorded a cover version of Metallica's "Orion" for a 2006 "Kerrang!" tribute album marking the twentieth anniversary of the release of "Master of Puppets".