Well, let's see... People here use that wildlife to battle each other, in matches that are surprisingly nonlethal, all things considered. There's ledges scattered throughout various routes that you can easily jump down, but are utterly impossible to climb up. Every few years ago a new region of the world and, with it, new such wildlife becomes known... and is treated as if it had existed all along. It's impossible to keep a sharp edge on anything, even a kitchen knife used strictly for cooking, for long. Magic from other worlds doesn't work here, and the locals will claim there's no such thing, even though there's little other explanation for the sheer power and other oddities the local wildlife possess.

Oh, and approximately twice a year things manage to become even stranger for a few days, if you can believe that.