The Bone-Penetrating Treasure Mirror is the Sect's Sacred Artifact of the Observing Body Sect, but like the Eight Trigrams Purple Gold Furnace, it was lost long ago during internal turmoil within the Magic Sect a thousand years ago, and its whereabouts are unknown.
Li Xiuyuan has read about it in records and heard some Jianghu legends, but has never seen the actual object.
In contemporary science fiction works, there's often mention of a high-tech device called a healing chamber. No matter what injury or disease one suffers, you can lie inside, press a button, and get healed.
The mysterious function of the Bone-Penetrating Treasure Mirror is similar to the healing chamber in sci-fi works. With this divine artifact, even the most difficult-to-detect hidden injuries, including various lurking risks in the body, can be clearly revealed.
