Another theme could be loyalty. Since it's related to the emperor, there might be characters who are loyal to the emperor or the idea of the imperial power symbolized by the sword. There could also be those who oppose it, creating conflict. And perhaps the theme of destiny. The sword might be tied to a certain destiny, either for the empire or for the characters involved with it.
One similar manhwa could be 'Tower of God'. It has an intricate world - building with different levels and powers, much like 'the sword of the emperor' might have. Another is 'Solo Leveling' which features a protagonist growing in power in a fantasy world. And 'The Beginning After The End' also has elements of a character evolving in a complex, magical setting.
One way could be to have the child adopted by a trusted family in a remote area. Another option is to give the child a magical charm that makes them invisible to certain people. You could also have the child live in a hidden village protected by powerful magic.
Well, one way could be to change the child's appearance and give them a new identity. Another option could be to send them to a remote location that's not easily accessible. It really depends on the context and the specific plot of the manhwa.
In 'a piece of sword' manhwa, the story centers around a character's determination to find the fabled sword. They face numerous obstacles and have to overcome them using their skills and wits. The plot is full of excitement and unexpected twists.
" Sword Son of Heaven " was a fantasy novel, and the author was Yi Nan. The main story was about Dong Yang, a young man who could not cultivate, coming to the imperial city of the Great Xia Dynasty in search of a cure. He was humiliated. After being rejected by all four sects, he accidentally entered the ruined Temple of Longevity and unexpectedly received the help of an expert. This novel had a total of 1153 chapters and was already completed. The latest chapter of Sword Son of Heaven was chapter 1170, Outside the Deserted World, in the Chaos. This novel was very popular on the Internet, and many people were reading and paying attention to it.