I'm a Noble on the Brink of Ruin, So I Might as Well Try Mastering Magic (Manga): Volume 6

The repute of Liam's nation of monsters is spreading by the day, drawing both cautious scrutiny from surrounding nations and meddling from some unsavory forces. But their country's might grows along with their infamy! Liam's familiars cheerfully send intruders home crying—even turning it into a contest—while Liam continues to expand his magic repertoire with one novel idea after the next. To cap it all off, the land of Liam-Lardon sees a population boom with a sudden and surprisingly adorable wave of immigrants! But good things never last, and one of the neighboring nations is done with just watching from a distance. These tides of change bring Liam and his familiars their most perilous challenge to date, putting their nation to the ultimate test!