A controversial metal festival has booked a Slipknot cover band as their headliner after more bands dropped off the lineup. The festival in question is Shell Shock II, which is set to take place in Orlando, Florida on Oct. 19. Hosted by The Antihero Podcast, the festival is meant to raise awareness for post-traumatic stress disorder (PTSD), with proceeds going to the C.A.T. II Foundation through First Responders Coffee and Cigars [via Eventbrite].