Actually, Jidro wasn't very clear whether the Mirror Nightmare truly existed or not.
His understanding of the Mirror Nightmare came solely from the terrifying legends among the Mirror Demons.
Before Jidro arrived in the real world, there had been several large-scale death incidents of Mirror Demons in the Inner World.
After a few panics, the Mirror Demons began to suspect that it was the Mirror Nightmare's doing.
This was the only real incident related to the Mirror Nightmare that Jidro had ever heard of.
He shared everything he knew about the Mirror World and the legends of the Mirror Nightmare with Wen Wen, allowing Wen Wen to gain some understanding of the so-called Mirror Nightmare.
Even though Jidro said it was just a legend, Wen Wen still believed that the one who had trapped You Han in the mirror was the Mirror Nightmare.
After all, its ability was clearly laid out right there, making it impossible for Wen Wen not to believe.
