The Hook Paper has indeed strengthened significantly.
Li Yan made a judgment in an instant.
On regular days, the Hook Paper would only react if it was close to or directly in contact with traces of Demonic Qi.
Yet now, it detected it without getting close to the Taoist Temple.
Without any hesitation, Li Yan immediately stored and sensed it.
In an instant, the surroundings were shrouded in mist.
But unlike before, when the mist was so dense that nothing could be seen, now it was noticeably lighter, allowing visibility up to a hundred meters away.
Li Yan's lips pressed lightly together, and his heart pounded.
Yin Changsheng used this method to learn many secrets of heaven and earth, potentially even more than what was recorded in the ancient stone tablets of Wang Chan.
Thinking of this, Li Yan carefully surveyed his surroundings.
Within a hundred meters, the ground was all sandy and barren, not a blade of grass in sight, looking quite ordinary without any anomalies.
