We now know a little more information about Surly’s next Barrel-Aged Darkness release.

According to a label filed with the Alcohol and Tobacco Tax and Trade Bureau (TTB), Barrel-Aged Darkness 2020 is a 12 percent ABV barrel-aged version of the Minneapolis-based brewery’s Darkness Russian imperial stout that has been aged in rye whiskey barrels and packaged in 750ml bottles. The base Darkness stout is brewed with pale ale, golden promise, crystal, dark crystal, oats, black, chocolate, and roast malts, as well as Amarillo, Columbus, and Simcoe hops.

Interestingly,  there have already been three barrel-aged versions of this year’s Darkness sold, as well as this year’s non-barrel-aged base beer. In fact, all four were released during Darkness Day 2019 that took place on Sept. 27-28 at the Somerset Amphitheater in Somerset, Wis. The three variants conditioned on different adjuncts were:

The Darkness series started in 2007 and has featured a different monster on the bottle every year since it was first released. This year’s monster is a “six-limbed savage” drawn by artist Tim Chapman, while past years’ label art have included depictions of “a screeching bat nightmare,” a mummy, the Devil, a vampire, a werewolf and the Grim Reaper.

An email sent to the brewery for additional information was not immediately returned.