The Myriad Essence Stone: an ancient treasure born from heaven that contained the essences of myriad lives. Various human bloodlines, mysterious beasts of all kinds, elemental and great spirits — at the exception of the likes of Divine and Ancient Spirits, the essences of all bloodlines under the jurisdiction of Heaven appeared in that stone.
In the past safely locked in the Highest Heaven Palace's treasury, the Myriad Essence Stone was later stolen by the Infernal Paradise's most resourceful thief — with the support of concealment artifacts bestowed by various Primeval Devils.
Many believed that Shenzhuo allowed it to be stolen, but with no proof to back these serious accusations, they all kept their mouths shut. When the four infernal nuns first appeared to Qiu Meng, they offered him the stone, which he sealed under the Nameless Sword Mountain, at a location known only to Xinzi and him.