That Time I Got Reincarnated as a Slime, Vol. 16 (Light Novel) (novel)

Rimuru has emerged victorious in the war against the Eastern Empire, but between the ultimate skill Michael taking over Ludora's body and the mystic lord Feldway lurking behind the scenes, he still has a lot left on his plate. Meanwhile, the fight at the labyrinth-conducted while Rimuru was busy with his own climactic battle-revealed some serious flaws in the monster nation's defenses. Now that things are calmer, it's time for our favorite demon slime to address some major infrastructure issues with his team...