I Am a Warlord in the Heavens

Li Ci is a good student who loves nuclear testing, but he was forced to sign an agreement because of his sister's serious illness. The agreement stated that Li Ci would serve as the representative and captain to mediate some war issues, and the price was negotiable. Wait, what aspect of war is this? What does it mean to travel to a western fantasy and use mortars to bomb the castle and capture the earl alive? What does it mean to use guided missiles to clean the polluted land in the last days? What does it mean to use a nuclear bomb to blow up the cave of a Nascent Soul monster???