Adds Megalium, a more powerful and virulent version of mycelium, which will spawn in temperate biomes and spread across the surface, rotting out overworld trees and growing mushrooms in their place. Needless to say, do not use this mod unless you are okay with your surface being irreversibly overtaken by fungi.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.21.2, 1.21.3
- 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 Modrinth — 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.
Verified by MCModsHub
- Ships as aashroomdoom-1.0.0.jar — drop this file into the mods folder
- Download size: 30 KB
- Download link checked 20 Aug 2026 — working
These come from our own check of the pack file, not from the source page.