Every universe has its own characteristics.
And the more one adapts to these characteristics, the stronger one becomes.
Under this characteristic, those who adapt will receive corresponding enhancement, while those who do not, will not enjoy such enhancement and may even experience some weakening.
Even if it's just a little bit, if two powerhouses of equal Cultivation Realm or strength face off, this addition and subtraction will make a significant difference.
This is also why the Era-Ancient Civilization, despite having Origin Realm powerhouses, is unwilling to enter the Starry Universe.
Because, even if they are Origin Realm powerhouses, once they enter the Starry Universe, they will be weakened accordingly. Moreover, for powerhouses of such a Realm, the Starry Universe as a complete Great Universe will weaken them even more than ordinary powerhouses.
Until they are no longer invincible.
Or, even if they are strong enough to resist the weakening of the Starry Universe.
