That Time I Got Reincarnated As a Slime, Vol. 12 (light Novel)

Threatened by Tempest's rapid expansion, the Eastern Empire finally begins to strike back. According to Chloe, the time-traveling Hero, there exists a timeline in which the Empire defeats Rimuru and Tempest subsequently collapses. While Rimuru's doom isn't set in stone, his victory isn't a foregone conclusion either. And to make matters worse, an Empire spy seems to have infiltrated Tempest...