Han Yi was terrified.
Although he had heard about the World-Ending God Demon, he was not worried about it this time. After all, his time in this world was limited to only twenty years. Currently, in the Great Spirit Country, the only one at the Undying Realm peak was Wei Zheng, the master of the Spirit God Mansion. Based on Han Yi's investigation, Wei Zheng was at least severely injured, if not already dead.
Building from destruction is something one would only encounter in novels and TV shows. In reality, without thorough preparation and excellent condition, it's absurd to think of breaking through from the Undying Realm to the Primordial Realm.
But the aura that emerged just now, although fleeting, had indeed far surpassed that of a Half-immortal.
Though Han Yi hadn't observed any God Demons at the Undying Realm in this world, he had studied the Life and Death Realm God Demons several times and was very familiar with their aura.