Dungeon Survival: I Got a Daily Sign-In System

Seven billion people wake up trapped in an underground labyrinth with nothing but a pickaxe and mud walls. Dig forward to survive—each room holds monsters, resources, or death. Most rely on luck to stay alive. Jiang Yu, however, has a game-breaking advantage: a daily sign-in system that rewards him with overpowered loot. Gatling guns, hundredfold critical strikes, legendary gear—while others scrape by, he's building an arsenal. In a world where survival is a lottery, he's rigged the game.