Rubbercore
Rubbercore mixes Hardcore tension with normal survival gameplay.
Players are not banned on death. Instead, every death removes 1 max heart, making survival matter without locking anyone out of the server. Lost hearts can be recovered with craftable Heart Crystals, and players can even turn one of their own hearts into a tradable crystal with /heart.
This creates real risk, recovery, and player-driven trading without turning your SMP into full Hardcore.
Features
- Players start with 10 hearts
- Each death removes 1 max heart
- Minimum health is 1 heart
- Heart Crystals restore lost hearts
/heartlets players remove one of their own hearts and receive a Heart Crystal item- Heart Crystals can be kept, traded, or dropped for other players
Heart Crystal Recipe
Tested on Paper 1.21.11.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20, 1.20.1, 1.20.2
- 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 Rubbercore.jar — drop this file into the mods folder
- Download size: 9 KB
- Download link checked 23 Aug 2026 — working
These come from our own check of the pack file, not from the source page.