The outer edge of this ring has six flat edges, so that it presents a hexagonal appearance. One of the sides bears a setting carved of obsidian, topped by a small black diamond. The size of the diamond determines the ring's power. A blackstone ring enhances its wearer's combat abilities by subtly influencing the flow of probability. Swings that would otherwise miss somehow manage to find their way to the target, and attacks that do land hit harder than they should.