"There's something in the caves" is a mod that adds a very dangerous mob in Lush Caves called "The Unknown"
He is a mob that spawns only in Lush Caves, and can kill the player instantly with a Jumpscare if he gets too close.
Geckolib is required to play this mod
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- 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.
Verified by MCModsHub
- Ships as there_is_something_in_the_caves-1.0.1-neoforge-1.21.1.jar — drop this file into the mods folder
- Download size: 2.2 MB
- Download link checked 30 Aug 2026 — working
These come from our own check of the pack file, not from the source page.