Border Nobles: Let's Lie Down and Start by Transforming the Magic Cannon

[Western Fantasy Farming + War + Machiavellian Strategy + Technical Flow + Underbelly] Xianyu just wants to lie down, but there is a witch outside and a powerful person inside. It is impossible to work hard, so the exiled young lady can only struggle. Monsters and the like can't fight at all, they can only modify the magic cannon to survive. All the fear comes from the lack of firepower... Right? Let's take a look at how a salted fish uses its "lying flat" posture to shake up the structure of the entire world.