Worlds need shiny.
…No, seriously, every world needs shiny. From the lightest animated fluff to the most grimdark cyberpunk postapocafic, a world has to have shiny. Something awesome. Something sparkly. Something that gets the reader’s attention, so they say, “Wouldn’t it be neat if-?”
Writing is condensed language. If you’re going to condense a whole lumpy illogical mass of a world into a book, you need some sparkles on it. Your characters need to breathe, to live, for the readers to get caught up in the story.
And, well – humans are like ravens. Shiny!
This doesn’t have to be something literally sparkly. Though I would never turn down bling in a setting. Heck, part of the appeal of Magi is the legitimate excuse for characters to wear shiny objects! Not just as Vessels, but as decoys….
Maybe the shiny is the possibility of psychic powers. Or the chance of stumbling on an enchanted cloak. Or computer programmers with the cool skill to knife through security systems and never leave a trace. Or just the concept of a setting where an oddball character can find a place to fit. (Behind the Scenes, great manga for that!)
Maybe it’s even just a turn of phrase. Aristotle apparently referred to silk as “woven wind”, and you can imagine what magical bunnies might do with that….
Give your characters some shiny. They, and your readers, will love it.