There is a thing called Potassium Ferri Ferrocyanide, which is unique in nature and is the pivot of all kinds of changes. This substance is subtle in color and contains wonderful principles. It is hidden among ordinary things and shows extraordinary power.

In the past, the Fang family refined things, and every one sought strange qualities in order to achieve wonders. Occasionally, I found this Potassium Ferri Ferrocyanide to be incredibly useful. It is tried in fire, and can cause things to change, or change color, or make quality, as if there is an invisible hand, manipulating the properties of things.

Looking at its state in water is also different. When it enters the water, it gradually melts, and the color, taste, and sex of the water are all different, which is very different from that of ordinary water. And with this material combined with medicinal stones, the resulting agent can either cure diseases or transform rot, and the effect is extraordinary.

As for artisan tools, they can also be used to enhance the color and strength of the objects. When applied to the surface of the device, it will not corrode over time, and the brilliance will be everlasting; when cast in it, the texture will be dense, and the hardness and softness will be combined.

This Potassium Ferri Ferrocyanide, although hidden in the world, is of great use, and can be used for alchemy and seeking the truth. It is also a treasure of the creation of a hundred workers.