Underneath the huge overhang of Giant Man, there is a highly featured slab with a few bolt lines up it. Black Slabbath climbs the right most bolt line up the, you guessed it, black slab. As you would exspect, the route is balancy and the holds are pretty small and directionally dependant. The climbing is really good and a bit challenging. The route Hot Head (5.10c) does climb up above this so take care if people are struggling above you as you near the anchors, or if they are not paying attention when lowering off. This route is a good warm up for the harder lines at the crag as it's technical and will stretch you out a bit, and just a worthwhile route while you are hanging around.