Watching that strange machine operating rapidly, the old blacksmith Hummel's eyes were wide in shock and perplexity.
Its core was filled with the radiance of magical power. The Repulsion mechanism that could be described as austere was carrying out a to-and-fro movement under the effect of a simple magic circle and a series of mechanical structures. The heavy sprocket wheel was spinning swiftly, driven by the connecting rod and crankshaft. The speed it was spinning at exceeded that of any windmill, waterwheel, or crank handled by manual labor. He knew very well how heavy that big metal wheel was. It was something that could easily break a person's bones once it was set spinning, yet it was being driven, and it was done so in a breeze.
Meanwhile, the two rune craftsmen beside him saw more and also thought of more.