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I also mentioned the book and the pipeweed.
And, I guess I'm confused why "Well, they might possibly have this thing" is suddenly an acceptable measure. But my "They likely have walls and guards" was vehemently denied as destroying their simply agrarian lifestyle.
I mean, a magical greenhouse? Magical buildings aren't really a thing, this would be a treasure a kingdom might requisiton to show their wealth and power, but it is perfectly meaningless to just assume a halfling town of less than a hundred people might just have one lying around?