Card Awakening: I Created a Player System

As an overworked office drone, I was walking past a zebra crossing when a young man shoved me aside to save a child. I stepped into empty space and transmigrated to a parallel world, one where zombies and mutated beasts had only recently appeared. Because of a virus, all food and water had been contaminated and were undrinkable. Lost and helpless, Yang Chao awakened a card-based ability! His life changed completely thanks to his cards. He made fried chicken cards and ate fried chicken at every meal, while everyone else struggled to survive and fill their stomachs. They killed zombies to carve out a safe place for themselves, while he used his cards to build an underground fortress. He then created NPC templates. From then on, people could trade the crystals they earned by hunting zombies, and anyone with enough crystals could buy delicious food from the Food Merchant NPC, solving their food and drink problems... Later, players, instances, events, and more began to appear...