Metal casting elevates working with metal to a whole new level. Beating heated metal is only able to achieve so much; but pouring molten metal into a pre-made mold brings out practically infinite possibilities. With the invention of gunpowder, and the resulting need of great quantities of identical metallic balls to be used by gun-armed units, metal casting proves quickly to be an incredibly useful technique, which soon finds its way to civil usage as well. Metal Casting makes possible the first crude cannons, known as Bombards. And siege warfare will soon change forever.