Creative writing, or the speculative fiction genre, has long leveraged something called the MICE quotient. I first came across this when I was reading an Orson Scott Card book on how to write science fiction and fantasy (I think it was even titled How to Write Science Fiction and Fantasy). The premise is that stories in the speculative fiction genre can be broadly binned as having one or more of four, primary drivers: milieu, idea, character, and event. Although most good stories will incorporate multiple of these components, with different ones emphasized at different times, there is usually one that drives the story forward.
No, I'm not above using cliche titles, when they serve me. Because I'm so very fond of stirring up controversy, I'm going to talk about something that divides more people than religion, politics, or the Great Pumpkin: movie/book adaptations. Fair warning: we're going to talk about some big name franchises, including Harry Potter, Star Wars, The Lord of the Rings, Star Trek, Jurassic Park, and others, so if you don't want to risk potential spoilers from either the book or movie versions of any of these, you might not want to read this post. Otherwise, let's mire ourselves in controversy.
Unsouled, and the Cradle series as a whole, is described as something called martial arts fantasy. The magic system has defined levels of skill, with each skill level gaining distinct abilities and possessing unique attributes. It's not a design that I generally prefer, but it worked well in Unsouled. Which matters, because Unsouled is not necessarily the kind of book that you read for the compelling characters or political drama. You read it for the vivid magical fights.