God-Slaying Arrow, each arrowhead of the God-Slaying Arrow is inlaid with a gemstone the size of a thumb, available in two colors, red and blue. What Nian Bing has been doing these days is setting these red and blue gemstones into the arrows. Of course, it's not just simple inlaying; inlaying is just the first step. Although tungsten steel is hard, it's not much in the face of his Skyfire that can melt iron and gold. The real challenge is the process of sealing powerful Magic Seals into each gemstone.