You Sent Me Undercover in a Cult, and I Became the Strongest Ghost King

Blue Sea is a place of remarkable people and beautiful scenery. It is famous for missing persons, urban legends, and an evil organization called Tong, whose members are all nonhuman.

At the request of the Human Destiny Security Alliance, Wei Shi'an must join Tong and go undercover within its ranks.

During his mission, Wei Shi'an unexpectedly awakens the Strongest Ghost King Development System. He can earn rewards by killing ghosts or meeting certain conditions.

Reward obtained: Ghost weapon, Cicada's Chill Cleaver!

Reward obtained: Compendium of Ghosts. The Host can awaken any ghost listed within and make it a servant!

Reward obtained: ...

When the Human Destiny Security Alliance finally closes in,

everyone is shocked to discover that the undercover agent they sent in has grown into the most powerful Ghost King in the world!

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.