In a world with dungeon cores, where enslaving one could potentially mean an endless source of profit; how does one nation change the game itself? Simple; they make one of their own.

Not only that, but as a human-made dungeon, its purpose is not to defend itself from adventurers or the government, but to act as the nations's weapon and attack other dungeon cores and any other target.

At least, that's how it was originally made, but what happens when it begins to slowly but surely develop its own independent consciousness?