Qin Muye arrived at the Witch's cottage with Tian Qi and 50 Evangelical Spirit Monsters in tow. You've got to admit, it was quite well hidden, practically invisible to the average person.
It seemed to be protected by some sort of illusion that jumbled human perception, so normally, to find the Witch, one had to use special methods or align their emotional frequency with hers to see through the deceptive magic.
However, Qin Muye was different; he had a Magic Shield. No illusion could penetrate the multiple layers of magic power that made up his protection.
If the illusion was like light, then Qin Muye's Magic Shield was the wall that blocked the illusions from entering his body.
Unless it was an environmental type of illusion or one so clever that it could bypass his Magic Shield, Qin Muye was generally immune to such tricks.
As for mental or spiritual types of illusions, they might be a possibility, but this particular illusion was clearly not of that kind.
