```
"Hmm, we must be cautious. Creatures inside the castle have already sensed our presence. I suspect these human-faced spiders were sent deliberately. Although they haven't hurt us, I'm concerned that as we delve deeper, we will encounter more and more dangers like this. We must be mentally prepared."
Rebry's gaze held an added measure of vigilance.
Such a vast castle offered too many hiding spots and ambush opportunities, and even though the three of them pushed their spiritual sense to its limit, many dangers couldn't be detected by spiritual sense alone. They had to rely on their ability to react in the moment, which kept the explorers perpetually tense and easily fatigued.
