Rent Utawarerumono: Vol.3 (2006)

Episodes 11-14 of the fantasy anime series. Loyalty leads to death, especially when an evil dictator would rather cover the world with blood than take prisoners. Now, a demon from the benevolent emperor's long-forgotten past threatens to tear his country apart. He must face his dark truth and fight an internal war alone. The rival emperor is ramping up the destruction, razing entire villages and leaving inhabitants to die in the ruin. No longer able to sit idly by, the kindhearted leader orders his wicked rival put to death. Opposing forces attack with great rage in this tumultuous clash of good versus evil.