Alcohol.
It was an extremely ancient product—so ancient that humanity could not even determine exactly when the first alcohol had appeared.
Sometimes, Lin Yu was curious...
What had the first person to discover alcohol actually been like?
After all, alcohol came from fermentation.
So, had the first person to discover alcohol... taken a sip of the liquid that seeped out after some grain or fruit had spoiled, only to discover that he had not died?
But...
Compared with the discovery of most edible foods, the discovery of alcohol had another important mystery.
Regardless of how unique a food looked or how bizarrely it had come into being, as long as people ate it and found it delicious, without suffering any discomfort, ancient humans could judge it to be something fit to eat or drink.
But...
Anyone who had drunk alcohol knew that drunkenness was not exactly an experience that made people feel, "I'm very healthy."
That dizzy, sluggish sensation, possibly accompanied by vomiting and unconsciousness, followed by waking up the next day with pain all over and a splitting headache—in the eyes of ancient humans, it was really no different from "poisoning."
So...
Lin Yu guessed that the discovery of alcohol had probably been a long and tortuous process. For a very long time, this stuff had likely been considered some kind of "poison."
In a sense... alcohol really could be regarded as a slow-acting poison.
It was just that one of this poison's side effects was the ability to make people feel happy.
So...
The state of "drunkenness" itself could also be regarded as a negative status.
And Lin Yu could now draw a conclusion.
The general effect of Dionysus Yin Lan's "Heart Domain" was... to "spread" the state of "drunkenness."
At that moment, standing more than ten meters