Metallica is helping the WWE Universe prepare for No Mercy with their new song "All Nightmare Long," as it will serve as the theme for the Oct. 5 pay-per-view.

The song comes from Death Magnetic, the band's first album of fresh material in five years. Metallica has already enjoyed enormous success with singles from their latest release, "The Day That Never Comes," "My Apocalypse," and "Cyanide." Death Magnetic is available now on Warner Bros. Records. (Get it on iTunes).

Listen to "All Nightmare Long" and don't miss No Mercy, Sunday, Oct. 5, only on pay-per-view. For more on Metallica visit Metallica.com and MissionMetallica.com. Also, check out Metallica's videos on YouTube.