ControlSpawn

ControlSpawn

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

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📖 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.

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✨ 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

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🎮 Commands

All commands require operator permissions (level 2).

Block

Command	Description
/controlspawn block on	Enable spawn blocking
/controlspawn block off	Disable spawn blocking
/controlspawn block set <Y> up	Block spawning above Y
/controlspawn block set <Y> down	Block spawning below Y
/controlspawn block range <min> <max>	Block spawning between min and max
/controlspawn block whitelist add <mob>	Mob ignores height restriction
/controlspawn block whitelist remove <mob>	Remove mob from whitelist
/controlspawn block blacklist add <mob>	Mob is always blocked
/controlspawn block blacklist remove <mob>	Remove mob from blacklist
/controlspawn block list whitelist	Show block whitelist
/controlspawn block list blacklist	Show block blacklist

Boost

Command	Description
/controlspawn boost on	Enable spawn boost
/controlspawn boost off	Disable spawn boost
/controlspawn boost set <Y> up	Boost spawning above Y
/controlspawn boost set <Y> down	Boost spawning below Y
/controlspawn boost range <min> <max>	Boost spawning between min and max
/controlspawn boost multiplier <1-10>	Spawn rate multiplier (default 3)
/controlspawn boost whitelist add <mob>	Boost applies only to this mob
/controlspawn boost whitelist remove <mob>	Remove mob from boost whitelist
/controlspawn boost blacklist add <mob>	Boost does not apply to this mob
/controlspawn boost blacklist remove <mob>	Remove mob from boost blacklist
/controlspawn boost list whitelist	Show boost whitelist
/controlspawn boost list blacklist	Show boost blacklist

General

Command	Description
/controlspawn get	Show current status of both channels
/controlspawn save	Force-save all settings

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💡 Examples

Keep your sky base free of phantoms:

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/controlspawn block set 180 up

Prevent mobs from spawning deep in your mines:

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/controlspawn block set -50 down

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

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/controlspawn block range 60 80

Always block phantoms, regardless of height:

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/controlspawn block blacklist add minecraft:phantom

Boost zombie spawning in a narrow zone:

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

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📝 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).

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🔧 Technical Details

• Minecraft version: 1.20.1

• Mod loader: Forge (47.x and above)

• Java version: 17

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