It must be said that the Magic Mirror has quite a few limitations. Firstly, the targets it observes cannot be those powerful figures.
Otherwise, the Magic Mirror would be damaged. According to it, after Old Lead emerged, it 'saw' Old Lead and suffered a counterattack from him.
Moreover, this kind of observation can be blocked. For example, methods like Present Disconnected Space can effectively block the Magic Mirror's observation.
Li Changhe confirmed this by testing the Magic Mirror on Mr. Bai's Pet Shop and the Night Manor of the [Mountain and River Alliance].
It couldn't see the former clearly. The mirror only showed fog.
The latter, it did not dare to look at, saying it had a familiar feeling which meant it definitely couldn't see it.
"Ha, a familiar feeling." Li Changhe hummed lightly, realizing what the existence the [Heaven's Principle] was relying on.
Secondly, the Magic Mirror couldn't predict the future.