As for how they had found the Shadow Immortal Realm...
That tale had to begin with Nanhua and the Ancient Emperor becoming friends while fishing in the Eternal Antiquity Immortal Sea.
Back then.
Nanhua's senses naturally had not been mistaken when he achieved Dao Attainment. A true immortal would never suffer hallucinations, nor would he doubt his own perceptions.
He had once asked Meng Sheng.
Meng Sheng had looked astonished and merely shaken his head. When he achieved Dao Attainment, he had sensed no Shadow Immortal Realm whatsoever. His perceptions had been within the eternal heaven great Dao.
Nanhua sighed.
In the end, he steeled himself and went to ask Chen Xun. After all, Dao Ancestor, you were the one who gave me this job. Now that you've achieved Dao Attainment, surely you aren't really leaving the whole thing to me alone!
Chen Xun spun so much nonsense with Nanhua that he nearly talked the latter into a daze. Big Black Ox listened in a muddle and nearly began doubting himself, yet never once suspected Chen Xun of boasting to the heavens.
Little Crimson was quite talkative and intensely curious.
In the end, Chen Xun shut Little Crimson down with a single remark: "You talk too much."
Finally, Chen Xun expounded on mysteries and marvels to Nanhua, explaining a great deal about the reverse five elements immortal Dao. Nanhua left with a glimmer of understanding, feeling that the reverse five elements immortal Dao was truly unfathomable-it could even turn back and devour the Dao Ancestor's own great Dao.
Many years later.
Only then did he emerge from his epiphany and realize: He still never said where the Shadow Immortal Realm was!
Chen Xun was a street loafer wandering all over Eternal Antiquity. Forget about finding him anywhere.
He knew jack