Xia Chen's eyes stared at the precious knife in his hand. When he thought that it might be Tianwai Crystal Iron, his breathing was a little rushed. Perhaps the name Tianwai Crystal Iron was strange, but as a refiner, Xia Chen knew how precious Tianwai Crystal Iron was.

This kind of material comes from the outside of the sky, and its quantity is extremely scarce. Ore is the first one to fall on the ground. It is called epitectic mineral, which is then continuously refined by refiners and finally becomes epitectic iron.

Tianwai crystal iron can be used to make a lot of treasures, and the texture is very tough,...