Coheed and Cambria is an American progressive rock band from Nyack, New York, formed in 1995. The band consists of Claudio Sanchez, Travis Stever, Josh Eppard, and Zach Cooper. The group's music incorporates aspects of progressive rock, pop, heavy metal, and post-hardcore. (Wikipedia)

Mastodon is an American heavy metal band from Atlanta, Georgia, formed in 2000. The group is composed of Troy Sanders, Brent Hinds, Bill Kelliher, and Brann Dailor. Mastodon has released seven studio albums, as well as a number of other releases. (Wikipedia)