The Saga of Tanya the Evil Novel Volume 12 is written by Carlo Zen with illustrations by Shinobu Shinotsuki.

Despite victory after victory, the Empire advances towards its inevitable fate. Having seen what merciless reality has to offer, Zettour's gathers what remains of his love for his country and begins working toward the best possible defeat he can afford to bring the Empire. And to do that, what he needs is not rhyme nor reason. Zettour will do what he must to shock the world. All that is left is to become the source of all evil...