Don't Panic When You Encounter a World of Warcraft. Take Out Your Mecha and Fight It.

Russell traveled to a small lord and got a system that could buy anything. Looking at the shabby territory destroyed by monsters, Russell began to climb the technological tree in this magical world. What? You said that other lords invaded the territory? Don't worry, buy an ak production line and teach them how to behave. Just defeated the enemy and another monster invades? Too big to hit? Don't panic, let me take out a mecha and fight it hard! What? The gods are coming? Sorry, come to my territory, even if you are a god, you must abide by my laws! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.