Heavy metal is about to lose one of its biggest and most iconic acts.

Slayer has announced that—after 37 years together—the band will embark on its final tour in 2018.

The Los Angeles quartet broke the news via a YouTube video this morning, the clip starting out with the words "The End of Days Is Near".

Formed in 1981, Slayer was (along with Metallica, Anthrax, and Megadeth) one of metal’s fabled Big Four, the group riding a thrashy strain of hard rock to instant international stardom. The group—anchored by singer-bassist Tom Araya and guitarist Kerry King—has remained one of the most respected and influential acts in the genre throughout its decades-long run.

Slayer never sold out for radio airplay like Metallica, and never seemed to be going through the motions like Megadeth and Anthrax.

The band did however produce some of the most iconic records in the history of heavy metal, including the devestating Reign in Blood. Slayer's last album, Repentless, was released in 2015. 

You can watch the band’s video annoucement below. Before you do, though, make sure you’re wearing black.