We first heard that Mastodon would be on the forthcoming “Catch the Throne” mixtape when Killswitch Engage vocalist Jesse Leach told us back in December off the record while we were talking to him at an Opeth show (yeah, I know, we dropped something). At the time, only Killswitch had been announced, then Anthrax said they would be on it as well. We’ve heard snippets of Anthrax and Killswitch, but earlier today, it was officially announced that Mastodon would be included on the mixtape as well. HBO SVP of Multicultural Marketing Lucinda Martinez stated that she’s psyched that metal is on this one:

“Catch the Throne: The Mixtape garnered much praise and piqued interest of artists wanting to partake in its sequel. We’re excited to seize the opportunity to channel the fandom of these artists into volume 2 and give audiences another opportunity to experience original music inspired by the show. We are particularly excited to integrate heavy metal into the mixtape this time around to continue our celebration of this groundbreaking series.”

Volume 1 had over 2.5 million streams so far, and there’s sure to be interest for the second one. Here’s a description of Volume 2:

The 15-song mixtape features diverse artists representing Game of Thrones families, leveraging themes and highlights from season 4. Showcasing the importance of music in Game of Thrones, each song on the mixtape samples music from the show’s season 4 soundtrack. This year’s mixtape also weaves in the overarching theme of fire and ice, providing listeners with an exciting line-up of heavy metal and hip-hop artists.

The second volume will be released next month, shortly before the April 12th premiere of the fifth season of Game of Thrones on HBO. We’ll likely get to hear at least a snippet of the Mastodon track before then.