ControlSpawn

Full control over mob spawning — block or boost spawns by height with whitelists and blacklists. Lightweight, server-friendly, and compatible with other mods.

📖 About

ControlSpawn is a utility mod for Minecraft 1.20.1 (Forge) that gives you complete control over where mobs are allowed to spawn. Block spawning in a specific height range, boost spawning in another, and fine-tune everything with whitelists and blacklists — all through simple in-game commands.

The mod hooks into Forge's official spawn event instead of patching vanilla code, so it works alongside other mods without conflicts.

✨ Features

• Block spawning by height

  • UP — block spawning above a given Y level

  • DOWN — block spawning below a given Y level

  • RANGE — block spawning between two Y levels

• Boost spawning by height

  • Same three modes: UP, DOWN, RANGE

  • Adjustable multiplier from 1x to 10x

  • Perfect for mob farms, adventure maps, or themed worlds

• Whitelist & Blacklist

  • Whitelisted mobs ignore block restrictions or become the only targets of boost

  • Blacklisted mobs are always blocked or always excluded from boost

  • Separate lists for block and boost channels

• Persistent settings — everything is saved and survives world reloads and game restarts

• In-game commands with full tab-completion for heights and mob IDs

• Smart filtering — only affects natural spawning, chunk generation, and patrols. Spawners, spawn eggs, commands, and summoned mobs are never touched

• Compatible with other mods — no Mixins, no patched vanilla classes

🎮 Commands

All commands require operator permissions (level 2).

Block

Boost

General

💡 Examples

Keep your sky base free of phantoms:

/controlspawn block set 180 up

Prevent mobs from spawning deep in your mines:

/controlspawn block set -50 down

Block spawning in a specific band (e.g. village level):

/controlspawn block range 60 80

Always block phantoms, regardless of height:

/controlspawn block blacklist add minecraft:phantom

Boost zombie spawning in a narrow zone:

/controlspawn boost range 60 70
/controlspawn boost multiplier 5
/controlspawn boost whitelist add minecraft:zombie

📝 Mob IDs

Use the standard namespace:entity format:

• minecraft:zombie

• minecraft:phantom

• minecraft:bat

The namespace can be omitted for vanilla mobs — zombie works the same as minecraft:zombie. For modded mobs, use their full ID (e.g. iceandfire:dragon).

🔧 Technical Details

• Minecraft version: 1.20.1

• Mod loader: Forge (47.x and above)

• Java version: 17

• Side: Both (server-side required in multiplayer)