Decades ago, the brutally aggressive noise of Slayer helped define and shape the genre of thrash metal. Now, after almost 37 years, the band members will lay down their axes, but not before one last tour to say goodbye to their fans.

Slayer performs at the Orange Stage at Fun Fun Fun Fest at Auditorium Shores on Sunday, November 10, 2013. Photo by Tina Phan/American-Statesman

Lamb of God, Anthrax, Behemoth, and Testament will support Slayer on the tour.

Tickets go on sale Friday at 10 a.m. More info.