Mystery Revival: I Have the Underworld System

This is a world where the supernatural is returning.

Hell is empty, and evil spirits roam among the living!

After years of fighting monsters, the male lead has finally risen from a lowly ghost constable.

"Ding! The Yin Energy Pool is full. Upgrade now?"

"Upgrade."

"Please choose an upgrade path."

"What are the options?"

"One: Yin Spirit Envoy: Ghost King, Day Patrol Envoy, Night Patrol Envoy."

"Two: Soul-Reaping Envoy: Black Impermanence, White Impermanence, Ox-Head, Horse-Face."

"Three: Demon Nether Envoy: Leopard Tail, Bird Beak, Fish Gills, Yellow Wasp."

"Heh. Soul-Reaping Envoy, White Impermanence!"

"If I say she's a deity, then she's a deity. She's definitely not some kind of ghost god, got it?" - A haughty young woman

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.