Another theme could be destiny. The emperor may be seen as having a pre - ordained role or destiny in relation to the country. The dragon amulet might be a symbol of this destiny or a tool to fulfill it. And the characters around the emperor may also be part of this grander scheme of destiny, either helping or hindering the emperor's path towards fulfilling what is expected of him in relation to the country.
Power and its acquisition could be a main theme. Since it has 'kingcraft' in the title, characters might be vying for the throne or influence. And the dragon amulet could be related to that power struggle.
One similar novel could be 'The Emperor's Seal'. It also involves elements of emperors and some sort of magical or important item like the dragon amulet in your mentioned novel.
Since I don't know the exact 'dragon amulet novel', it's hard to say. But usually, there might be a brave adventurer, a wise old mentor, and perhaps a dragon or a dragon - like creature.
I'm not sure specifically as there could be many novels with 'dragon amulet' in the title. It might be about a magical adventure involving a dragon amulet, perhaps with a hero or heroine on a quest to find it, or it could be about the powers and secrets the amulet holds.
Power is likely a main theme. Since it has a dragon emperor, power dynamics - how one gains, maintains, and uses power - could be central.
Power and growth. The protagonist constantly strives to become more powerful and overcome his limitations.
Power is likely a main theme. With a dragon emperor involved, there's probably a focus on the acquisition and use of power.
Power and self - improvement are main themes. The protagonist is constantly striving to become stronger in the martial arts world.
One of the main themes is family. The characters often rely on and protect their family members throughout the story. Another theme is adventure, as they embark on dangerous quests in a magical world.
I think the theme of self - discovery is also there. As the character progresses in the martial arts journey, they might discover their true potential, their purpose in this world of martial emperors and gods. Also, friendship and rivalry play a role. There could be comrades who help the main character along the way and rivals who push them to become better.