/lit/ - Literature

>have this grand story in mind that I've been working on for years
>have all of these fleshed out characters and settings for them to live in, as well as a semblance of a timeline for the story
>have no real BBEG, nor do I really have a cohesive set of antagonists at all really besides some key ones
>still stuck on how I want magic to work in this world
How the fuck do I get myself out from in front of this giant writer's block? I've been trying to watch and read more stories that are in the same genre of fantasy I'm trying to write but I haven't found any concepts that I could adjust or build upon for my own story.