Before that, when they had faced the blood-colored demonic beasts together, Cao Zhen had also cast a purple thunderbolt proficiency, and he could feel the power of that proficiency.
However, that wasn't really considered Cao Zhen engaging in combat with another person, as they were mostly just opposing the Blood River of the demonic beasts.
Now, he truly saw Cao Zhen in combat with someone else, and it completely overturned his understanding.
On his way here, he had also wondered how strong Cao Zhen could be, and now, he felt that Cao Zhen's divine skills actually possessed the power of a Golden Core.
However, taking into account that no matter how strong Cao Zhen was, he was still only at the Core Formation Stage, he thought that Cao Zhen was at most a bit stronger than his disciple Ling Xi, who could withstand a Golden Core and even defeat an ordinary Golden Core Stage One.
