A certain forbidden land, a certain ball cage, a certain seal, or perhaps... a certain exile?
That layer exiled with countless broken sculptures, constantly eroding the will of certain "units" within the display layer by calling, perhaps using the same principle as the "law mages" exiled by time, continuously penetrating the time dimension and then eroding the consciousness of dream builders...
Just like a radio station, "law mages" have their exclusive contamination frequency band, and broken sculptures have their own contamination frequency band. Only when the frequency is tuned correctly can they receive their contamination...
Some people have insufficient contamination and won't encounter such pollution all their lives.
And Lin Yi's adaptable contamination limit keeps him in a state of "fine-tuning," collecting bits here and there... absorbing all kinds of contamination, yet still energetically bouncing around.
