To the Stars by Hieronym
I'm 6 chapters in. Take the ending to the Madoka Magica TV series and advance time hundreds of years. The future depicted is vigorously worldbuilt, there's a movie watched that covers 100,000 Magical Girls going incognito to a space colony to provide military assistance when aliens attack because the human army doesn't have the hardware to stand against them. Magical Girls meets Military Sci-Fi.
But the real gem here for Sorcerously Advanced players is the depiction of Mami, Kyoko, Homura, and Yuma's dynamic over the centuries, from the founding of MSY back before the world was post-scarcity to the present day. It's great help for considering how characters who lived through the entire interregnum may be.
