When I Finish This Game, I'll Beat You to Death!

On the day of wrath, at the end of time, all things in heaven and earth will turn to ashes, just as David and Sybilla foretold. All people of the world, trembling as they await judgment, will surely come before it. All living beings will be punished and scrutinized. A wondrous melody resounds beneath my command, across the entire army. This is the signal to begin the war. My soldiers shall gather beneath this throne. On that day, tears and sins will face punishment. My subjects, rise again from the ashes. Then, at that moment, the Lord will forgive them. The infinitely merciful one promises them eternal rest today. Amen. Flow out (Atziluth) -- Overflow from chaos (Du-sollst)? Day of Wrath (Dies Irae)

This is a fanfic based on Dies Irae. Even if you don't understand it or haven't read Dies Irae, you can still enjoy this book. The setting and worldbuilding are explained quite clearly, as long as readers don't skip chapters at random. The early plot isn't very good, so please bear with it. The later chapters show improvement and change.