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They Wanted a Hero. They Made a Monster: Siege of the Monster King (Volume 3)

by CaffeinatedTales

Language: English

Published: 2026-09-17. 86,162 Words.

Categories: Fiction » Fantasy » Dark

Content Rating: Older than 13

They've come to kill the monster.
He's already working out what to do with their skills.

Evan is a sentient mushroom with an expanding army, a ruthless streak, and a talent for turning dead enemies into new abilities. His fungal network is spreading through the dungeon. Adventurers are even paying to use his creations.

Business is good. Until the people upstairs decide the mushrooms need exterminating.

The Church and the Adventurers' Guild are preparing to strike. Below Evan's territory, widening rifts threaten the dungeon itself. Holding his ground won't be enough. To protect everything he's grown, he needs to reach the Dungeon Core and claim control before his home tears itself apart.

Unfortunately, the route runs straight through monsters powerful enough to wipe out his scouting parties. And his best source of answers is a talking book with a dangerous appetite and very good reasons to lie.

Evan has an answer of his own: steal better skills. Build deadlier mushrooms. Make the next army harder to kill.

With Sin of Greed, a slain predator can become the blueprint for his next weapon. Explosive spores, armored troops, and specialized fungal bodies give him new ways to conquer the depths. Every hard-won ability could open another passage. Every failed experiment costs bodies and mana he may need when the invaders arrive.

They're hunting a monster king. He's preparing an entire ecosystem for war.

This third volume brings tactical army building and skill-driven progression fantasy into a LitRPG battle for survival, with monstrous ingenuity, dangerous dungeon bosses, and the dark humor of a commander who treats deadly enemies as future resources.

But something beyond his territory has already reached into his private network.

If Evan can't keep a stranger out of his own network, how long can he keep his empire under his control?


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