一則本生故事，講述一位貧窮卻手藝精湛的鐵匠打造出一枚可刺穿骰子又能浮於水面的精巧鋼針，藏於七層鞘中層層展現，終以此贏得鐵匠首領之女的芳心。

A birth-story about a poor but ingenious smith who wins the hand of the master smith’s daughter by crafting an exquisite needle, nested within seven sheaths, delicate enough to pierce dice yet float on water.