Atlanta progressive metallers MASTODON have teamed up with the the London, England-based Signature Brew to create Black Tongue, an 8.3% Double Black IPA named after one of the band's songs.Signature Brew's description: "Rumbling smoky notes are offset by the elixir of misbehaving punchy hops. Mosaic and Magnum hops to the front, with Carafa Special 3 Malt and Pale on the baseline, this is our biggest and most powerful creation to date. The band wanted to create a 'pallet crusher' and that's certainly what has been delivered. A beer for enjoying slowly, letting the bombardment of flavour and intensity hit your tongue and explode with every sip." For more information, go to this location. Launched in August 2011, Signature Brew works with musicians to create custom brews tailored to the artists' specific tastes. According to Bloomberg, the idea behind Signature Brew is simple: Let a band sample a range of beers, write down what its members like and don't like, and then create a brew specifically for them.