Coheed and Cambria, not so far removed from an opening spot for Soundgarden this past summer, are headed out again, this time setting the table for metal titans Iron Maiden. They're also in the studio working on their sixth album, and lead singer Claudio Sanchez "leaked" this video recently of him playing one of the new tunes acoustically. The song is "Sentry the Defiant," and while you're waiting for the band's new album, you can scope the video above and download the audio on the band's website.