There were two Emperor Zuns in the world: one real, one fake.
One was the Netherworld Emperor Duan De, vouched for by the spirit of an Immortal Artifact, in possession of the Humanoid Immortal Medicine: Ye Fan, the Sacred Body from the Primordial Ancient Star, who would prove his Dao with a cauldron.
The other was the ultimate mastermind plotting to refine the Great Universe. Even the Dark Supremes would find that a little extreme. If that day ever came, the great Life Restricted Areas would all emerge to protect the Great Universe.
Put those two before the myriad races of the universe and ask them to tell the real Emperor Zun from the fake, and even Chuan Ying, the First Divine General of the Heavenly Court, would be baffled. He would think Ye Fan was more likely to be Emperor Zun.
Chuan Ying had lived through countless ages and weathered who knew how many Dark Turmoils. He had long since become an old hand. If he had not thought Ye Fan might be Emperor Zun reincarnated, why would he have stepped forward to protect him?
In the unofficial history Lin Xian had concocted, Ye Fan was unquestionably Emperor Zun reincarnated. Anyone else claiming to be Emperor Zun was an impostor.
Setting aside the facts, the Immortal Emperor had ample motive.
How could the radiant, noble Lord of the Heavenly Court refine the universe and destroy his own foundation? It had to be the Immortal Emperor's conspiracy. He had impersonated Emperor Zun and done it himself.
Refining two worlds to forge an Immortal Artifact—just listen to that. It had to be the work of someone from the Immortal Realm, evil by nature.
Emperor Zun, by contrast, was a native-born Red Dust Immortal who already had eternal life. Why would he