Darkness is coming next month.

According to a post on Surly Brewing Co.’s website, it will again be releasing Darkness Russian imperial stout on Darkness Day, which this year will fall on Oct. 15.

The Minneapolis, Minn.-based brewery’s Russian imperial 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. The series started in 2007 and has featured a different monster on the bottle every year since it was first released.

In addition, according to filings with the Alcohol and Tobacco Tax and Trade Bureau (TTB), Barrel-Aged Darkness 2016 will also be released, the same 10.6 percent ABV Russian imperial stout that has been aged in rye whiskey barrels and packaged in 750ml bottles.

However, according to a post on Surly’s head of brewing operations Todd Haug Twitter account, “It’s in process for a different release date than Darkness.”

todd haug on Twitter It’s in process for a different release date than Darkness. RT @theshwig: @surlybrewer Will there be BA #Darkness this year?

Both of this year’s incarnations of Darkness will once again be packaged in 750ml bottles and will feature bottle art of Cerberus, the legendary three-headed hound of Greek mythology who guarded the gates of Hades. Past years’ label art have included depictions of “a screeching bat nightmare,” a mummy, the Devil, a vampire, a werewolf and the Grim Reaper, among others.

According to the brewery, only 1,5000 attendees to Darkness Day will be allowed to purchase up to six bottles of Darkness 2016, while any bottles remaining after the initial sale will be sold on a first come, first served basis with a four bottle limit.

Update (July 16, 2016) — This post was updated to include details on the event date. It was originally published on May 22, 2016.

Update (Sept. 22, 2016) — This post was updated to include details on Barrel-Aged Darkness 2016.

Update (Oct. 7, 2016) — This post was updated to include details on bottle limits of Darkness 2016.