Hey, I had an idea to write a story set in a post-apocalyptic fantasy setting with magic. Basically, I thought, "What if there was a devastating war using magic that completely destroyed the characters' nations, rendering it a barren wasteland with sparse few life here and there? What would happen?" The main character's name is Guji Oscarus and the setting is fifteen years since the war happened (when he was born.) I think that instead of radiation, perhaps magical effects that are still going? Or something like that. Need to brainstorm ideas. Where do I start?