This article was written after reading Battle Through the Sky. You may see some shadows in it. Well, you can say that I am still a novice, so I can learn from it to some extent, but the article is still my own thoughts. There will be a pair of father and son, and two pairs of brothers, one of whom is a relative and the other is not a relative. It mainly talks about magic and then practice and upgrade. There will also be magicians and so on. Well, that's it. If you are looking forward to it, you can read on.