Heart Chilling Iron is the hardest metal on the Continent. It's been named Frost Iron Ore in Tang San's previous world. On the surface of the ore is a hint of cold air but it otherwise look just like a jet black piece of iron ore. A piece of Heart Chilling Iron require fifty thousand years to breed. It's value is simple astronomical. This metal is as precious as a Hundred-thousand year old Spirit Ring.
Heart Chilling Iron is one of the most important materials required, as it is one of the three great core materials to create the Buddha Fury Tang Lotus.