
Vanilla SkyBlock
A server-side only SkyBlock experience for NeoForge 1.21.1. Includes custom void generation, GUI shop, player market, upgrades, and 100+ advancements.
Screenshots

About this Mod
🌌 SkyBlock Horizon (Server-Side Core)
A complete, premium, and feature-rich SkyBlock system designed specifically for NeoForge 1.21.1.
Unlike other mods, SkyBlock Horizon runs 100% on the server side. Players can connect to your server using a completely vanilla Minecraft client—no downloads or installs needed on their end!
✨ Key Features
🌌 Complete Void Generation (With Stronghold Support)
- Generates a completely empty void world (no land, no water, no grass, no ruined portals, no dungeons).
- Strongholds are preserved! Players can still find and use the End Portal to defeat the Ender Dragon and access the End.
- Includes a balanced Starter Chest containing only: 1x Oak Sapling, 1x Wheat Seeds, 5x Bread, 1x Water Bucket, and 1x Lava Bucket.
🏪 Double-Chest GUI Shop (/shop)
- A full, beautiful server-side Chest GUI. No ugly text links!
- Offers customized trade menus for buying and selling items in amounts of 1x, 64x, or Sell All.
- Features categories like Blocks, Farming, Ores, Food, Mob Drops, and Decorations.
🧬 Diverse Mob Spawner Tiers (T1–T3)
- Buy custom spawners for 18 different mobs divided into three tier categories: Common, Advanced, and Elite.
- Tier 1: Standard spawners with default spawn rates.
- Tier 2: Faster delay, increased spawn count.
- Tier 3: Ultra-fast delay, maximum spawn counts for ultimate grinding.
- Properties are safely injected server-side via custom NBT data.
🛒 Player-to-Player Market (/market)
- A 6-row pagination GUI allowing players to trade with each other.
- List items using
/market sell <price>. - Browse, buy, or cancel listings interactively.
📈 Balanced Base & Ore Upgrades (/skyblock upgrade)
- Expand your island's boundary limit or upgrade the ore generator block chances.
- Upgrades require logical progression items (e.g., wood stacks, stones, blocks) instead of unrealistic iron rates.
🏆 100+ Custom SkyBlock Advancements
- Fully custom, progression-oriented advancement tree (106 advancements) tailored for SkyBlock.
- Features milestones for block breaks, mob kills, trading milestones, wealth accumulations, and base levels.
- Syncs automatically with vanilla clients.
🛡️ Other Features
- Live Scoreboard: Keep track of your coin balance right on the sidebar.
- Day Transitions: Server-wide alerts when a new day begins (e.g.
✦ Day 5 has begun! ✦). - Visual Boundaries: Server-side particles highlight your island border when you get close to its edge.
Available Versions
How to Install Vanilla SkyBlock on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set neoforge Loader
In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.2).
Install Mod
Open the mod browser in the dashboard and search for "Vanilla SkyBlock". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.2, 1.21.1
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Vanilla SkyBlock server crashes on startup – what to do?
Most common cause: wrong neoforge 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 (1.21.2). You can switch loaders with one click in the panel.
Is Vanilla SkyBlock compatible with neoforge?
Vanilla SkyBlock officially supports neoforge for Minecraft 1.21.2, 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Vanilla SkyBlock – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Vanilla SkyBlock 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.
Rent Modded Server
Install Vanilla SkyBlock with just one click on your server.