My Ultimate Sign-in System

In a world governed by bloodlines and ancient mana, a commoner discovers that the entire world is his treasure chest. For a century, Earth has been transformed by the "Great Convergence," where modern skyscrapers sit atop ancient ley lines and mega-corporations are led by High Mages. Lucian Reed is a "Null"—a person with zero mana affinity, working as a lowly janitor at the prestigious Aetheria Academy, the training ground for the world's elite hunters. On his 20th birthday, while cleaning the restricted "Forbidden Archive" of the Academy, a mechanical voice echoes in his mind: [Ding! Ancient Location detected: The Forbidden Archive. Would you like to Sign-in?] With a simple "Yes," Lucian receives the "Primordial Chaos Body," a physique that hasn't been seen in ten thousand years. Now, while the world struggles to cultivate through decades of meditation, Lucian simply needs to show up. Sign-in at the Cursed Sewer: Reward [God-Slaying Dagger]. Sign-in at the CEO’s Office of the Dragon Group: Reward [99% Share Ownership]. Sign-in at the Abyssal Rift: Reward [Eternal Shadow Army]. Lucian decides to stay low-key, hiding his god-tier powers behind his janitor uniform. But as ancient gods awaken and urban wars break out, the world will soon learn that the most dangerous man on Earth is the one holding the broom.