Billions of humans worldwide find themselves trapped in an unprecedented "Demon Kings and Heroes" game, transported to a parallel world where they must assume roles as either Demon Kings or Heroes. Zhang Nu awakens in the Demon King faction, only to discover an extraordinary ability—he alone can perceive hidden system information invisible to all other players. As he examines his starting options, the choices reveal themselves through mystical classifications: [Slime Demon King] with its weak bloodline foundation, [Kobold Demon King] equally unimpressive, [Dark Elf Demon King] offering mid-tier potential, [Bloody Giant Demon King] boasting high-grade power, and finally [Abyssal Dragon Demon King]—the apex selection with the strongest starting bloodline available. Zhang Nu's unique insight transforms what should be an impossible decision into an overwhelming advantage, setting him on a path to dominate a world where countless others stumble through darkness, blind to the very information that could define their fate.