"If they are that dangerous, how did you survive all this time?" Karyk asked.
Even if the city was protected in the past, it didn't mean it could be protected forever. It was especially the case since according to the girl, the people who protected this city had already died.
That's why he didn't understand why she was still able to survive. Why did the Elzerian King not enter this place to kill her? It couldn't be for the reason that the city was hidden. Although it was hard to find this city, it wasn't impossible after all.
If he was in Elzerian's place, he would've first wiped all hidden dangers that could become a bigger threat in the future. He didn't believe that they were fools to not know this.
"You have something that scares them..." Karyk came to a conclusion. This was the only thing that made sense to him. He believed that the only reason the Elzerian King didn't wipe this place was because he was scared.