Legend had it that during the Spring and Autumn period, the divine smith Gan Jiang and his wife Mo Xie forged swords for the King of Chu.
But the King of Chu was cruel, imposing a harsh deadline and even bestowing two pieces of "Yin-Yang Fiend Iron" as materials-iron that had absorbed earth-lung poison fire and ninefold nether cold fiend, long since gaining sentience and becoming spirits.
No ordinary fire could melt this iron, nor any ordinary hammer forge it. The deadline drew near; if the swords remained unfinished, husband and wife would both die.
In despair, Mo Xie cast herself into the furnace, using her own essence blood as a catalyst to awaken the iron's ferocity and help it melt. Grief-stricken beyond endurance, Gan Jiang cut off his hair and nails and cast them in as well. Only then did the furnace fire reach perfect purity, and yin and yang converge.
At last, the male and female swords were forged.
Yet from the moment of their creation, forged through the sacrifice of a living soul upon a foundation of fiend iron, these swords possessed a ferocity that towered to the heavens, pioneering the evil path of "forging swords with souls"! On the day they were completed, the furnace exploded and the workshop was destroyed. Gan Jiang took the twin swords to present them to the King of Chu, only for their Sword Qi to lash back at his mind. Driven mad with the swords in his hands, he killed and wounded countless people before vanishing without a trace.
When his son Meijianchi grew up, he found the twin swords to avenge his parents. Though still a youth, he awakened their killing intent and wielded them to slaughter everyone in the King of Chu's palace. Blood stained Yingdu, tens of