The Millstone Hurling Module is a one-slot Rank 2 Module used to test your Giant's strength. The Module requires one Millstone to set up. When a friend with a Giant and a Millstone clicks your Module, a winner is randomly decided. If the guest wins, they win 10 Blue LEGO Bricks and the owner will need to reset the Module. If the Module owner wins, they earn the Giant's Hat Masterpiece Blueprint and the guest loses their Millstone. Besides that, the Millstone Hurling Module has absolutely no use.