
Lost Souls Mod (1.21.1, 1.20.1) – Turn City Ruins Into Deadly Dungeons
Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.
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Lost Souls Mod works with The Lost Cities mod to make buildings much more challenging. It turns some buildings into ‘haunted’ locations, filling them with extra and stronger mobs. These powerful monsters have more health and damage, and they will spawn even if the area is well-lit. To clear a haunted building, you have to defeat a certain number of them. The mod offers many options to adjust the difficulty.

Features:
- Turns some buildings into ‘haunted’ areas filled with powerful monsters.
- Boosts the health and damage of vanilla mobs that spawn inside.
- Mobs will appear regardless of the light level, making torches less effective for safety.
- You must defeat a specific number of mobs to ‘clear’ the building and stop them from spawning.
Configuration:
This mod is highly configurable, allowing you to change many settings:
- Control which types of mobs can spawn.
- Adjust how many mobs appear.
- Change the armor and weapons that mobs use.
- Set how strong the mobs are.
- Disable mobs from spawning in high light levels.
Screenshots:







Lost Souls Mod Download Links
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: In MC Java Mods, or directly above on this page.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Downloads as 25736.mcaddon
- Download size: 45 KB
- Download link checked 23 Sept 2026 — working
- Mirrored on our own servers — the download does not depend on the original host
These come from our own check of the pack file, not from the source page.