Farm, farm, farm like crazy. No matter what magical products you have, they’re dirt cheap next to mass production lines. The gear of your elite troops can’t compare to the equipment of my ordinary soldiers. How are you supposed to fight me?
The protagonist rides the wave of transmigration and makes it to a magical yet backward medieval world. Farming is the true path, and knowledge is the sharpest weapon. He uses the world’s countless strange portals to travel to other worlds for resources and wage war against his enemies.