The bronze palace was originally shrouded by the powers of the Heavenly Person Realm, which imposed absolute restraint on the Ancient God Clan. It not only suppressed their combat capacity but also, under such restrictive rules, directly disrupted their life structure.
Jing Ci once remarked that there was an Ancient Ancestor stubborn enough to not believe in these powers and forcibly fought within the Heavenly Person Realm. It didn't take long for his body to collapse, and even his soul dispersed into an unstable state. Although he survived by sheer luck, he had to sleep for tens of thousands of years, and even upon awakening, he likely wouldn't recover his peak state. For a god, this was an unbearable humiliation.
As for individuals like Gu Jianlin, who were amphibious beings, he could freely transition between human and Ancient God states.
Yet he still couldn't escape the binding of the Heavenly Person Realm.