A Divine Artifact jointly owned by the Five Great Academies. It was used in the Great Spiritual Academy Tournament, also used for selecting the talented younger generation who were qualified to enter the Spiritual Road.
It was a bronze mirror that was roughly a few thousand meters. The rim of the bronze mirror was filled with extremely profound runes, ancient and obscure. The surface of the mirror was dark ash-grey as if it was covered in dust and could not be seen. [1]
This Mirror of Judgement had been handed down since the ancient times. The light ray from it could penetrate the barrier of any plane. When it shined onto a Lower Plane, no one can hide from its light. It wa said that in the ancient times, the light of this Mirror of Judgement could even reduce Sovereign experts to dust. [1]
As the Mirror of Judgement had the ability to pierce through all obstacles and detect everything in the world, Mu Chen borrowed the Mirror to locate the Immortal Catalog. [2]