Alright, the loose rules of my setting, Belle Woods Superstars:
It's a world where magic has been known pretty much since the dawn of recorded civilization, and many of the legendary lost lands - Avalon, Shangri-La, Mu, Atlantis, et cetera - were, or are, real (the ones surviving to the present day get called First Lands instead of Lost Lands). Magic is a product of the life force of a world from a fountain of it called the First Magic. It's the sum of all the life on a world, basically, a reflection of the total life force of its inhabitants. Humankind contacted it, became magical, can't tap directly into it again because trying would basically kill them from the overload.
The arts are a vector for magic power and enchantment, and the spellbook gave way to the Reel and Projector system - you get little microfilms or flash drives and mount them in devices that often get as small as a smartphone and they unfold into wands that run complicated spellwork sealed into recordings and movies. That's the theme of Superstars; it's themed off movies and movie genres, with the titular heroes all taking after a genre they really like. They're part of a gifted echelon of magic users called Inspired; think magic prodigies who often get special schooling and aid and you're on the money.
The Superstars are crimefighters based out of their home city, Belle Woods, MA, and they're stuck in the middle of a millennia-long war between two philosophies on how to treat magic: on one hand you have the Libraries, who preserve magic artifacts, safeguard them and use them to teach others to advance the state of magic. On the other you have the Vaults, who believe in taking magic power from these things and even people and adding it to their own to lord over others. Belle Woods is basically an East Coast Hollywood and it's got a big Vault problem that's only getting bigger because the Vaults are gunning for some of the faculty of their school, for once being heroines that thwarted their efforts.
There's all sorts of stuff I could go into detail in - just ask.