"Because they are not true living beings, they have no way to wield the power of the law."
"Without the amplification of the law, they are inherently weaker than a true Tenth Layer of Celestial Human expert. Even though the quality of their true essence is higher than that of an ordinary Tenth Layer of Celestial Human, it is still difficult to make up for the gap."
"In other words, their strength is probably not even as good as a normal Ninth Layer of Celestial Realm, but if they work together, they can barely contend with a Ninth Layer of Celestial Realm that uses the power of the law. To truly rival a Tenth Layer of Celestial Human is still a stretch."
Chapter 686