Second, he probably didn't expect that the Divine Spear would attack right away—this optimistic thinking certainly did not match Lu Youxun's cautious mindset, but at that time he also couldn't think too deeply with the assumption that he was my enemy. These are all my speculations, I don't know how accurate they are.
"Tell me, Lu Youxun, who is manipulating you behind the scenes?" I asked.
"...I cannot answer."
Clearly in a situation where he must respond, Lu Youxun said this.
"Do you indeed have a way to resist the Black Rope Heart-locking Ring?" I asked.
"As long as there exists a spell that forcibly extracts answers, there must also exist a spell that prevents it. I have placed a prohibition on myself that prevents me from willingly speaking any information about the mastermind behind this. Even if you force me to reveal the details, or use spells like the Mind Reading Technique to dig out information, it would only trigger the prohibition effect and fry my brain."