Black Magic Rack Rock is a powerful attractant and a mineral rock supplement that is 100% natural and derived from parts of the Himalayan Salt mines. It will provide the four essential minerals - phosphorus, calcium, magnesium and sodium. These minerals will help promote antler and bone growth, digestion, muscle development and reproduction. This Black Magic Rack Rock will provide all the nutrients that deer lack and crave in their diet. This rock will draw all whitetail from all over the country!