There were various types of Dao talismans with many uses in the Dao Martial Saint Land. The Mirror Image Talisman was one of them. Moreover, there were two types of Mirror Image Talisman. They were ordinary Mirror Image Talismans and Minor Major Mirror Image Talismans.
An ordinary Mirror Image Talisman could be used to record scenes that occurred within a certain period of time in the form of motion pictures. When it was torn up, it would replay the scene it had recorded.
The effect was similar to a video camera on earth where Duan Ling Tian was from in his past life. The only difference was it did not record sounds.
Previously, when Duan Ling Tian was in the Moon Illumination Sect, someone from the Mountainshade Black Market's branch had plotted against him by using an ordinary Mirror Image Talisman.