Thalassonecrothrix Infection
Java mod listed for Minecraft 1.20. File opened and checked on 30 Sep 2026; downloads from the MC Java Mods app on Android.
⬇ Download on CurseForgeThe author built this one for Minecraft 1.20.1 on Forge. On other versions it may install and then do nothing.
TO ALL PEOPLE WANTING AN UPDATE: THIS PROJECT IS DEAD: I only work on another mod together with lemon called Insomniogenesis. So please update Insomnio instead of this.
Lore:
This infections origins lie far away in a lab founded by an evil organisation that produced bioweapons. One day this lab created an infectious flesh and coral hybrid that went on to breach containment and infect the entire lab. A survivor detonated the facility dying in the process. But some of the weakest worms that grew into the main infectors still survived and escaped to the outer world.
THIS MOD REQUIRES GECKOLIB
This was originally the Plasmosorium Polycephalum Mod and Organisorum Mod but got rebranded two times. All old files are still in the downloads. You can install Plasmosorium together with Organisorum or Thalassonecrotheix since they are two different mods under the same project. You can not install Organisorum and Thalassonecrothrix together since they have the same ID.
The mods command prefix is os: For example /summon os:vermis_maior
Models made by Lemon
DISCORD CLOSED
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 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: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as Organisorum Infection 0.2.0-forge-1.20.1 - beta.jar — drop this file into the mods folder
- Download size: 701 KB
- Download link checked 28 Sept 2026 — working
These come from our own check of the pack file, not from the source page.