Black Sabbath's first album with Ozzy Osbourne in 35 years, 13, won't be unleashed until some time in June (via Vertigo/Republic), but the heavy metal forefathers have just shared a brief peek at the studio sessions behind the upcoming LP.  In the video (below), Osbourne and bandmates Tommy Iommi and Geezer Butler pontificate about their legacy to drum up anticipation for their already highly anticipated new full-length.

"This Black Sabbath album is quite possibly the most important album of my career," Osbourne says in the video, after declaring, "Black Sabbath don't write songs that you hear on the radio. We write musical pieces."

Iommi adds, "I think it's got to this time now, that, after all these years, we can't leave it any longer. If we leave it any longer it'll be too late.”