Yan Zhen (豔貞, Yàn Zhēn) is a sword that belongs to Jun Wu and has the ability to determine if a person has ever engaged in sexual intercourse.[1]
Description[]
Nothing is known about its origin, but it belongs to Jun Wu's collection of rare swords. Should the blood of a virgin drip onto the sword, the sword will remain unstained and glow even brighter as the blood vanishes.[1]
Use[]
Its first and only use in the story is when Lan Chang accused Xie Lian of being the father of the Fetus Spirit. As several Heavenly Officials doubted his innocence and the overall conscience remained unclear, Jun Wu used the sword to determine whether Xie Lian has ever engaged in sexual relations before. No traces of his blood could be seen on the sword, proving Xie Lian's virginity at that point.[1]