Mazao had the ability to use the "blessing power" to track the target's past experiences. I gathered that the reason she kept observing the Shadow Swapping Monster's fingers was so she could use her tracking skill to investigate clues related to the Shadow Swapping Monster.
Since we couldn't count on Lu Youxun's side, we had to rely on Mazao first.
And Mazao gave a response that didn't disappoint expectations.
"I have managed to perceive a few things," she said, "this monster used to frequent a particular place for an extended period and interact with some people there. Sometimes he would go there every day and stay for a long period. If nothing unexpected happens, he should also be visiting that place frequently in the coming time."
"So, all we need to do is to ambush him there..." Suddenly, I saw a glimmer of hope for victory, "Then, what exactly is that place?"