Netherite Blocker Datapack

Minecraft Version: 1.21.4 Pack Format: 61 Purpose: Disables Ancient Debris generation in the Nether

🎯 What This Datapack Does

This datapack completely prevents Ancient Debris (Netherite ore) from generating in newly created Nether chunks. It works by overriding the vanilla placed features that control where and how Ancient Debris spawns.

⚠️ Important Notes

• New Chunks Only: Only affects newly generated chunks in the Nether
• Existing Chunks: Any Ancient Debris already generated will remain
• Complete Disabling: No Ancient Debris will generate in future chunks

📁 File Structure

netherite_blocker/
├── pack.mcmeta                           # Datapack metadata
├── data/minecraft/worldgen/placed_feature/
│   ├── ore_ancient_debris_large.json     # Disables large Ancient Debris clusters
│   └── ore_debris_small.json             # Disables small Ancient Debris clusters

🚀 Installation Instructions

Method 1: New World (Recommended)

1. Open Minecraft Java Edition 1.21.4
2. Create a new world
3. In the world creation menu, click "Data Packs"
4. Click "Available" and look for "Netherite Blocker"
5. Click the right arrow (>) to add it to your world
6. Click "Create New World"

Method 2: Existing World

1. Locate your world folder:

   • Windows: %APPDATA%\.minecraft\saves\[World Name]
   • Mac: ~/Library/Application Support/minecraft/saves/[World Name]
   • Linux: ~/.minecraft/saves/[World Name]

• Copy the datapack:

  • Copy the entire netherite_blocker folder
  • Paste it into your world's datapacks directory

• Enable the datapack:

  • Start your world
  • Run command: /datapack enable "file/netherite_blocker"
  • Run: /reload

🔧 Technical Details

How It Works

The datapack overrides two vanilla placed features:

1. minecraft:ore_ancient_debris_large - Large Ancient Debris clusters
2. minecraft:ore_ancient_debris_small - Small Ancient Debris clusters

Each override sets the minecraft:count placement modifier to 0, effectively preventing any instances of the feature from being placed in new chunks.

JSON Structure

{
  "feature": "minecraft:ore_ancient_debris_large",
  "placement": [
    {
      "type": "minecraft:count",
      "count": 0
    },
    // ... other placement modifiers
  ]
}

🛠️ Troubleshooting

Common Issues

"Missing metadata" Error:

• Ensure pack.mcmeta exists at the root of your datapack
• Verify pack format is 61 for Minecraft 1.21.4

"No key feature" Error:

• Your JSON files are missing the required feature field
• Ensure placement modifiers are correctly ordered

Ancient Debris Still Spawning:

• Check that you're exploring newly generated chunks
• Verify the datapack is enabled with /datapack list
• Run /reload to refresh datapack state

📝 Uninstallation

To remove the datapack:

1. Command Method:

   /datapack disable "file/netherite_blocker"
   

2. Manual Method:

   • Delete the netherite_blocker folder from your world's datapacks directory
   • Run /reload

🔗 Compatible Versions

• Minecraft Java Edition 1.21.4 ✓ (Current)
• Pack Format 61 ✓

📋 Commands Reference

⚠️ Server Considerations

For server administrators:

• New worlds recommended for complete effect
• Backup existing worlds before installation
• Test in development environment first
• Monitor world generation logs for verification

🎯 Expected Results

After installation:

• No new Ancient Debris will generate in explored Nether chunks
• Existing Ancient Debris in already-generated areas remains
• Players must find Ancient Debris through other means (trading, commands, etc.)
• This creates a resource scarcity challenge for server economies

Created: November 2025 Version: 1.0 Minecraft: 1.21.4 Author: AlanTheDev Website: https://modrinth.com/user/AlanTheDev