Reality is like a bad film forcefully pieced together without a coherent plot; sometimes, developments are forever unexpected.
All along, the trouble with spiritual contagions like dream sickness has been its ability to spread through the circulation of spiritual remnants, and the nature of these remnants can be perpetually unpredictable.
No matter how tightly you guard against it, if the deceased leaves behind some lingering thoughts, memories, or ideas on some object that falls into another's hands, it spreads just like that.
Whether it's money, plastic bags, or old clothes...
But the protection of the Heavenly Governor's Law is equivalent to a repulsion field that covers the entire city, almost imperceptible to ordinary people yet omnipresent, capable of adapting and responding to anomalies. Even without being formally activated, the remaining traces of spiritual contagions are thoroughly dispelled, making them difficult to endure.