"Hmm, we must be careful. The creatures inside the castle have sensed our presence. I suspect these human-faced spiders were sent to us on purpose. Although they haven't caused us harm, I'm worried that as we delve deeper, we'll face increasingly perilous situations. We absolutely must be mentally prepared," said Mr. Rebry, his gaze now holding a hint of cautiousness. Within such a vast castle, there were far too many places to hide and lay in wait for an ambush. Although the three of them had pushed their spiritual sense to its limits, many dangers couldn't be detected by spiritual sense alone and would have to be faced with on-the-spot reactions. This ensured that the explorers were constantly tense, an anxiety that could easily lead to fatigue.