Nuclear device, a weapon that can now be called an "antique" in the current era, appeared centuries ago.
Its technology is not highly sophisticated, as long as there are enough raw materials, even small workshops at the bottom of Nest City can craft it in a short period.
However, because it has a large-scale destructive impact and its power is quite formidable within a city, there have been incidents where company buildings were blown up by nuclear bombs... therefore, its control within Nest City is still relatively strict, with several raw material mines firmly in the hands of the council and large corporations. Only a few smugglers can obtain some from the wilderness.
As for the Floating Island, it is strictly forbidden for prisoners to smuggle nuclear devices. Once detected, the prison guards have the right to cut off this smuggling line directly.
