That Time I Got Reincarnated Slime Light Novel SC Vol 13

The Empire deploys a vast army over 900,000 soldiers strong to invade the Forest of Jura. In response, Ramiris evacuates Tempests inhabitants into the Dungeon for safety. While Primal Demons Testarossa and Ultima duke it out with the Empire on the front lines, the rest of the imperial army attempts to invade Ramiriss labyrinthine shelter. Little do they know, however, that the only thing theyll find there is a devastating bloodbath courtesy of Tempests own mighty forces.