From the Start, I Get Ten Thousand Yin Soldiers: The King of Hell Is My Big Brother

As a staunch materialist, Wang Mingyang does not believe ghosts exist. But after repeatedly failing to die, Wang Mingyang unexpectedly awakens the Underworld Agent System. He gains the third eye and can see ghosts, turning his worldview upside down. He unlocks Underworld Favorability, can travel back and forth between the realms of the living and the dead, and can command millions of ghost soldiers from the graveyards! By a stroke of fate, he even becomes sworn brothers with King Yama. Wang Mingyang recruits elite figures from every dynasty in the underworld. Shen Wansan builds him a business empire, while Zhao Zilong raises an army of ghost soldiers for him! Later, Wang Mingyang discovers that the Book of Life and Death can actually be rewritten! Urban tycoons? Heh, he can wipe them out with a wave of his hand! Immortals and monsters? Heh, he has ten million ghost soldiers! System + urban + war god + campus belle + fantasy + underworld + invincible + cultivation + return of the king