
Mob proof crystals
This mod allows to spawnproof big terrain areas with just one end crystal.
About this Mod
This mod allows to spawnproof areas of 64x64x64 blocks with just one end crystal (cubic, not spherical).
Each crystal you place in the world creates an area that starts from the block it is placed to 64 blocks above vertically and 32 blocks in each horizontal direction (north, east, south, west). This is mainly because it is easier to hide it below the surface you want to spawnproof.
Now is possible to rename crystals to avoid every crystal in the world be affected by this behaviour.
You can modify this configuration in the file crystal.properties that is created in your .minecraft folder.
To clarify some doubts about how lower-limit and crystal-name config variables works:
The lower-limit option specifies the bottom distance between the affected area and the block where the crystal is located (one above the obsidian).
By default it is set to 1 so that the last layer affected is the one below the end crystal (the obsidian one).
If you set it to 16, the area wil be lowered 16 blocks from the crystal. This will not expand the affected area, just move it in the Y coord.
The crystal-name property is meant to be used when you want to make only certain crystals to be able to spawnproof. Basically leaving it blank will make every crystal to be spawnproofing. Writing some word (or words) like "spawnproof" (spaces also allowed) will force players to rename crystals with a nametag named "spawnproof" to make them spawnproof their surroundings.
This is made for example if you want to have decorative crystals near farms where you need mob spawning.
The original idea of this concept is made by ethnographie and you cand find her datapack here.
Available Versions
How to Install Mob proof crystals on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.2).
Install Mod
Open the mod browser in the dashboard and search for "Mob proof crystals". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.2, 26.1.2, 26.1.1 (+15 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Mob proof crystals server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (26.2). You can switch loaders with one click in the panel.
Is Mob proof crystals compatible with fabric?
Mob proof crystals officially supports fabric for Minecraft 26.2, 26.1.2, 26.1.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Mob proof crystals – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Mob proof crystals consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Install Mob proof crystals with just one click on your server.