



DeepslateInfestation
A Fabric Minecraft mod that makes it more challenging (and annoying) to mine within deepslate.
Important!
- Optionally requires JsonPatcher to have the new mob included into kill_a_mob and kill_all_mobs advancements.
Description
Adds a new mob — Deepslate Silverfish — that only spawns under Y = 0 (configurable) even in places fully lit up by torches (configurable), but only near deepslate blocks — including slabs, other non-full blocks, walls, and even ceiling. It's a darker, smaller, weaker yet a much more prevalent version of a normal Silverfish.
Not only it spawns naturally where deepslate generates, the mob is also quite often found in a form of infested deepslate blocks.
Good luck mining with this little annoyance!
Installation
Requires Minecraft 1.20.1, Fabric Loader >=0.14.25, Fabric API and Cloth Config API.
Optionally requires JsonPatcher to have the new mob included into kill_a_mob and kill_all_mobs advancements.
Configuration
The mod can be configured from within the file ".minecraft/config/deepslateinfestation.json5" or using modmenu.
- Light level preventing Deepslate Silverfish spawning can be specified (15 by default, meaning allow spawning regardless of light level)
- Maximum height below which to allow Deepslate Silverfish spawning can be specified (0 by default, meaning allow spawning where deepslate starts generating)
License
DeepslateInfestation is licensed under MIT.
- 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 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.
- Ships as deepslateinfestation-1.20.1-1.0.jar — drop this file into the mods folder
- Download size: 65 KB
- Download link checked 9 Sept 2026 — working
These come from our own check of the pack file, not from the source page.