Sign In: My First Reward Was a Supreme Bone

Humanity watched in terror as nine colossal dragon corpses pulled a bronze coffin from the void, plunging towards Earth. For five years, Lin Feng, a transmigrator, had patiently waited for this exact moment. His dormant sign-in system roared to life, its first mission: sign in at Mount Tai as the Nine Dragons descended. Completing it granted him a legendary Supreme Bone—a power so immense, his first casual step shattered the sacred mountain itself. Now, trapped aboard the cosmic coffin with a bewildered class of arrogant classmates, Lin Feng must navigate the terrifying journey to Mars. But will his newfound strength be enough to survive a universe far more ruthless than he ever imagined, or will the ancient secrets within the coffin consume them all?