UnstableCore
The definitive plugin for bringing the Unstable SMP experience to your Minecraft server.
UnstableCore is a high-octane, SMP-focused plugin designed for chaos, high-stakes warfare, and advanced mechanics. Inspired by the Unstable Universe, this plugin adds dimension-tearing, orbital weaponry, and advanced combat bots to your server.
🚀 Key Features
| Mechanic | Description |
|---|---|
| Orbital Strikes | Call down devastating TNT strikes with setSource attribution to bypass damage immunity. |
| Pearl Cannon | Tactical teleportation arrays for base infiltration and rapid mobility. |
| Chunk Ban System | Enforce "Chunk Bans" using persistent shulker-entity triggers to lock down enemy territory. |
| Fighter AI Bots | Citizens-powered combat bots with dynamic difficulty (1-5), shield-breaking, and healing routines. |
| UnderWorld Dimension | A custom dimension featuring medieval fortresses, jagged spires, and guarded towers. |
| Far Lands Glitch | Procedural "Corner Far Lands" generation with massive walls, vertical shafts, and horizontal tunnels. |
| Soul Link System | Automated stasis-teleportation; save yourself from death with a 1-heart emergency link. |
| Proximity Discovery | Stealth-focused mechanics: death messages and achievements are restricted to a 100-block radius. |
📜 All Commands
| Command | Usage | Description |
|---|---|---|
/nick |
`/nick <name | reset>` |
/immortal |
/immortal [player] |
Toggle immortality. |
/stasis |
`/stasis [list | remove |
/unstable |
/unstable <subcommand> |
'Admin control for UnstableCore. |
/skin |
`/skin [target]' | 'reset` |
/orbital |
`/orbital <nuke | stab>` |
/cannon |
`/cannon <location | save> ` |
/fakeplayers |
`/fakeplayers <spawn [diff] | clear>` |
/chunkban |
/chunkban give |
Get chunk ban shulker boxes. |
/wolf |
/wolf |
Get the Wolf Pack Summoner rod. |
/soullink |
/soullink [remove] |
Set/Remove Soul Link. |
/farlands |
/farlands |
Teleport to the Far Lands dimension. |
🛠️ Advanced Gameplay Mechanics
⚔️ Combat & Warfare
- Mace-Elytra AI: Fighter bots utilize high-level PvP meta (jousting/shield-switching).
- Proximity Stealth: Death messages and advancements are only seen within a 100-block radius.
- UnderWorld Guardians: Wither Skeletons in the UnderWorld spawn with Protection II Diamond Armor and Sharpness I Diamond Swords.
🌌 Dimension Transitions
- Void Fall Transition: Falling below Y=-70 in the Overworld teleports you to the UnderWorld.
- Sky Bridge: Flying above Y=320 in the UnderWorld returns you to the Overworld.
⚠️ Requirements & Setup
- CitizensAPI (2.0.42-SNAPSHOT) and ProtocolLib (5.4.0) are required.
- Dimension Generation: Allow the plugin to auto-generate the
UnderWorldandFarLandsfolders on first boot. - World Cleanup: If you update generation parameters, delete the respective world folder to force a re-generation.
Built for Minecraft 1.21.11. Experience the Unstable Universe.
protocolib: https://github.com/dmulloy2/ProtocolLib/releases/download/5.4.0/ProtocolLib.jar
citizens: https://ci.citizensnpcs.co/job/Citizens2/4180/artifact/dist/target/Citizens-2.0.42-b4180.jar
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21, 1.21.1, 1.21.2
- 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.
- Ships as UnstableCore-2.0.0.jar — drop this file into the mods folder
- Download size: 144 KB
- Download link checked 5 Sept 2026 — working
These come from our own check of the pack file, not from the source page.