一则本生故事，讲述一位贫穷却手艺精湛的铁匠打造出一枚可刺穿骰子又能浮于水面的精巧钢针，藏于七层鞘中层层展现，终以此赢得铁匠首领之女的芳心。

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.