In fact.
Back in the Ancestral Spirit Realm.
Cheng Han unified all the ancestral spirits of that world and found the Tenth Calamity while it was still gestating. In the end, a group of God Emperors from the Myriad Heavens Race brazenly struck and killed the Tenth Calamity.
From then on, the World Stone left behind after the Celestial God Star Sea shattered opened up a vast amount of classified information to him, giving him a deeper understanding of "Calamities."
One crucial piece of information was this—every "Calamity" wielded the Law of Secrecy.
The "secrecy" in its name meant concealment.
Once concealment rose to the level of a law, it could naturally obscure all perception.
That was why, when the Twelfth Calamity had hidden in the Celestial God Star Sea, even the many God Emperors found it difficult to spy on it, while all kinds of prophetic secret arts were unable to locate it.
Qing He, relying on her exceptionally rare talent, dreamed of the disaster the Twelfth Calamity would bring to the Sky Blood Realm. Yet upon waking, she forgot everything completely. That, too, was the Law of Secrecy working behind the scenes.
Had Cheng Han not possessed the World Stone and the Divine Skill Eye of Omniscience, allowing him to notice something unusual, he likely would not have realized there was a problem either.
Besides that.
The World Stone conveyed another vital piece of information—the Twelfth Calamity, after devouring the Celestial God Star Sea, had also mastered another law.
That was—the Law of Listening.
Simply put, whenever any life-form lacking sufficient strength discussed the Twelfth Calamity, or matters closely related to it, it would sense it.
Honestly.
This was an utterly overpowered ability.
It was precisely because of this concern that Cheng Han had deliberately used a trick