Poisoned?
This indeed posed a problem. In this world, physical or magical attacks could be resisted, but poison was uniquely difficult to defend against. Not that humans lack ways to treat it. Like most life forms, humans are exceedingly fragile, and many things pose a lethal threat. In the world that Long Yi previously belonged to, he enthusiastically endorsed the saying that everything is poison, provided that the dose is large enough. That is, in sufficient quantities, anything can be toxic to the human body. It's impossible for humans to invent a remedy that can neutralize all types of poison, hence, they can't be specifically defended against.
Besides, this poison was clearly designed to target living creatures.
"What kind of poison is this?"
Long Yi carefully observed Ai Lin's condition. Apart from her complexion turning somewhat dark and her breaths becoming somewhat rapid, he didn't see many other symptoms.