RWBY: Rise Of The Star-Banner

Remnant. A world of wonder but also horrors. Humans and Faunus are beseeched by the creatures of darkness called the Grimm, surrounded by darkness that lurks in the shadows. A secret war only a select few know threatens all who live in it. The four kingdoms filled with both light and darkness, cannot seem to unite to fight for a better world. If they won't, an ancient power will do it for them. A long-hidden nation that will change it forever.

(My thanks to Anonymous24uare for the cover)