Laying Low in the Wasteland While Invading the Immortal Martial World

(Synopsis: A story about a good-for-nothing ability user in a wasteland world who can travel between it and a world of martial arts and immortal cultivation.) After the cataclysm, zombies run rampant and animals mutate. Ability users also emerge. As one of the wasteland world's earliest ability users, the protagonist's power is, unfortunately, Evergreen: he never ages. With little fighting ability, the protagonist can only lie low, surviving by growing mushrooms and raising meat chickens while discreetly carrying on the family line. But on his hundred-and-eighth birthday, he discovers that an antique wardrobe from before the cataclysm can take him to a world of martial arts and immortal cultivation, where the most powerful cultivators specialize in insects. Only the wealthiest cultivators can become insect cultivators, and the greatest advantage of spirit insects is their numbers. And all of that requires huge amounts of food. Fortunately, nearly a century after the Great Cataclysm, mushrooms have gone through more than ten generations of improvements, growing at a terrifying speed. The improved meat chickens reach market size in less than a month, and weighing thirty to fifty jin is nothing unusual. So the protagonist's time has come. You have quality, I have quantity. Countless spirit insects swarm forth.