Slipknot, Ozzy Osbourne combine Knotfest, Ozzfest

Slipknot and Ozzy Osbourne are combining Knotfest and Ozzfest for one massive metal festival. On September 24 and 25, bands such as Black Sabbath, Slipknot, Disturbed and Slayer will perform at San Manuel Amphitheater And Festival Grounds in San Bernardino, California

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Tickets are scheduled to go on sale Friday, May 20, at 10:00. Additional performances will include Suicide Silence, Whitechapel and Emmure. You can watch a live-stream announcement video below.

Watch more: 10 Things You Didn’t Know About Slipknot