Mastodon have announced that they will be playing a special benefit show at the Metro in Chicago, IL on September 9. That show will also feature Brain Tentacles and Power Mad (feat. Anthrax drummer Charlie Benante), and all proceeds will go towards the suicide prevention charity Hope For The Day. In other news, the show will also be the first place to get some of the new batch of “Crack The Skye” beer, a 11% ABV Russian imperial coffee stout. That will be available for public consumption on World Suicide Prevention Day (September 10), with part of the proceeds set to go to the previously mentioned charity as well.