Ascendancy

War never changes, merely the adversaries. Jaune Arc's dream was to be a hero, not a soldier. But now, as the Grimm rise up under a new master, he finds that he has little choice in the matter. Darkness will flood over Remnant as the Second Great War begins, and not everyone will live to see the light at the end of the tunnel... (Dark RWBY fic. Minor and major character deaths)