Ruling the World with Mechas, Starting with the Demon Ancestor’s God-Slaying Spear

A boy inherits the armor of the Primordial World’s apocalyptic Demon Ancestor. With fate deciding his path, what will he choose? Will he obey the Heavenly Dao and become its pawn, a hero basking in the spotlight? Or will he follow in the footsteps of the ancient Demon Ancestor Luo Hou and declare war on the Heavenly Dao, fighting and challenging the heavens with the gun in his hands, becoming an unruly Demon Ancestor? Or will he overturn the entire game and become the one moving the pieces?