Wang Chen was far too familiar with Magic Tools like the Mandarin Duck Mirror.
He himself possessed two sets of Mandarin Duck Mirrors. One of them was even the fairly high-grade Ten-Hour Mirror, whose effect could last for ten hours with a single activation.
Whenever Wang Chen had excavated underground passages and hidden chambers in the past, he would set up Mandarin Duck Mirrors to keep track of the situation aboveground.
Thus, he understood the characteristics of the Mandarin Duck Mirror extremely well.
When he had first entered this mine tunnel to search it, Wang Chen had felt as though someone were watching him.
Though the feeling had been exceedingly faint, and he had been unable to pinpoint its source, he knew perfectly well that it was no illusion.
Wang Chen had great confidence in, and trust for, his own perception ability.
But at the time, he had not investigated the source. Instead, after leading the others through a search of every mine tunnel, he had made a Returning Horse Spear.
This time, with his Divine Sense fully unleashed, Wang Chen immediately discovered something amiss.
The Mandarin Duck Mirror was undoubtedly highly concealable. Otherwise, if it could be easily discovered, this Magic Tool would lose all reason to exist. Under normal circumstances, not to mention Qi Condensation cultivators, even Purple Mansion cultivators would find it difficult to see through one so easily.
Yet Wang Chen's Divine Soul was far stronger than those of cultivators at the same level, and his senses were exceptionally sharp.
Only then had he unearthed the secret hidden within this mine.
The question was: who had placed a Mandarin Duck Mirror here, and for what purpose?
Wang Chen stared coldly at the Mandarin Duck Mirror in his hand, as though he could see someone on the