"Spells related to dreams?" Lu Yang rarely dealt with this sort of thing. Dream-entry spells were rather obscure. As far as he knew, only a few people in the Ask Dao Sect, including the Grand Elder, had studied them, and the Grand Elder was the most skilled.
Suddenly, Lu Yang's expression turned strange. He vaguely remembered meeting a mysterious person in a dream when he had first begun cultivating. That person had called himself the Celestial Venerable of Tofu and claimed that eating tofu would make him stronger...
Back then, he hadn't known any better and had thought it was just a nightmare.
Now that he thought about it, could Senior Sister have been behind it?
"If you don't understand dream-entry spells, it's easy to fall victim to them. But with this immortal here, I guarantee you won't be controlled by one!" The Undying Fairy spent all day in his mental space either watching the excitement or sleeping like a log. That showed just how thoroughly she had studied dream-entry spells.
"Can dream-entry spells control people?"
"Of course. You should have experienced it yourself. When you dream in your sleep, the contents gradually fade after you wake up, until all that remains is a vague impression, right?"
Lu Yang nodded. That was exactly how it worked.
"Then if someone used a spell to decide what you dreamed about, and kept doing it over a long period, wouldn't you be changed without even realizing it?"
Lu Yang suddenly understood and remembered something.
A long time ago, a trade association had used a large-scale dream-entry spell to advertise its products, making people dream about them. As a result, that particular product had sold exceptionally well.
When the scheme was exposed, Great Xia fined the association until it nearly went bankrupt and even