"Shall we establish a Princely State, or a Duchy?"
The smallest country is not a Duchy but a Princely State, which is to say, it's one held by a Master of Miracles who only possesses one miracle artifact.
Count Thorn, Spring Water Marchioness, although they are an Earl and a Marchioness, these are merely honorary titles under the allegiance to the Iron Eagle King.
In reality, their rule over their own territories is absolute and not subject to outsider interference.
Therefore, these people are called 'Kings'.
Just like in Bailuo's former life during the Spring and Autumn period, many countries were actually Marquis states, but out of respect, they would often be referred to as so-and-so Duke.
Of course, the title 'Duke' on the Miracle Mainland has a specific nobility rank, so it generally cannot be used casually.
Princes, Dukes, Kings, Great Emperors.
These are the four titles assigned to the Masters of Miracles on the Miracle New Continent.