Once they appear outside the city, it signifies the death of hundreds of thousands of lives within. Even a kingdom would have to painfully abandon it, and wait for the Kings of Curses to leave after they have had their fill.
As for rescue... it's not possible, and would only result in the needless sacrifice of more people!
Human species' so-called resistance to the Dark Tide, most of the time, is merely confronting those powerful Cursed Beasts that emerge from it, pushing them back or suppressing them within a golden cage.
As a result, gold in this world is a strategic resource, and private transactions between individuals all require official permission and can't exceed a certain quantity, or else it would be a treasonous act!
"This level of suppression doesn't feel like the Overlord's Aura, it's more similar to a Domain-like ability..."
