Monster Spawner Upgrades

Monster Spawner Upgrades

With this Datapack, you can craft different upgrades to apply to monster spawners.

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1.0K Downloads
datapackfabricforgeneoforgequiltmobstechnologyutility
Rent Server with this Mod

Screenshots

All Upgrades in Item Frames
Using an Upgrade
Failed to use Upgrade
Bedrock Fix

About this Mod

To access the texture pack, click on versions and click on the newest one. There should be a list of all relevant files.

Using Upgrades

If an upgrade is used (right-click), it will check for a spawner 2 blocks in front of the players looking direction. If there is a spawner, it will try to apply the upgrade. An upgrade can be applied if the spawner was not completely upgraded by the upgrade. Some upgrades can be applied multiple times. If the spawner check failed, the player nearest to the location, which was checked, will get the upgrade item back.

This mod is best paired with other mods that make spawn eggs obtainable or make spawners minable. This mod definitely works with the spawners keeping the upgrades: https://modrinth.com/datapack/mineable-spawner

Upgrade List

Nearby Entities Upgrade

(From 6 Base to 10 to 16)

Nearby Entites Upgrade RecipeNearby Entites Upgrade

Player Range Upgrade

(From 16 Base to 48)

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Maximal Possible Entity Spawns Upgrade

(From 4 Base to 5 to 6 to 8)

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Maximal Spawning Range Upgrade

If a Maximal Spawning Range Downgrade is applied, it will be set to the base. The upgrade can then be applied again. (From 4 Base to 7)

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Maximal Spawning Range Downgrade

If a Maximal Spawning Range Upgrade is applied, it will be set to the base. The upgrade can then be applied again. (From 4 Base to 2)

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Maximal Spawning Time Upgrade

The Spawner randomizes spawning time from Minimal Spawning Time to Maximal Spawning Time (From 800 Base to 750 to 700 to 650 to 600)

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Minimal Spawning Time Upgrade

The Spawner randomizes spawning time from Minimal Spawning Time to Maximal Spawning Time (From 200 Base to 100)

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Remove Sky Light Condition Upgrade

I didn't find a good way to check if the upgrade was applied already, so it can be use infinitely but won't have an effect.

Overwrites the custom spawn rules for the light-level of the sky with a minimum of 0 and a maximum of 15.

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Controllable Spawner Upgrade

Overwrites the custom spawn rules for the block light level with a minimum of 0 and a maximum of 5. Air blocks are also blocks.

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Experience Value Upgrade

Adds a small experience orb as a passenger to spawned entities

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Spawner Reset

Breaks target spawner dropping xp and placing a blank spawner at the location

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Bedrock Compatability

If you want to use this datapack on Geyser servers, extract the texture pack zip file and put the "SPWR_mappings.json" inside of Geyser's custom mappings folder and the "SPWR Bedrock.mcpack" inside of Geyser's pack folder. Both of the folders can take multiple files; no merging is needed.

Currently there is a bug on GeyserMC preventing players from using any items when looking at a Spawner (https://github.com/GeyserMC/Geyser/issues/5225).

I found a workaround to this by clicking on the bottom of a block above the spawner. Look at the gallery for a GIF showing it.

Available Versions

Version 2release
MC 1.21.4fabric, forge, neoforge, quilt
December 18, 2024
Version 2release
MC 1.21.4datapack
December 18, 2024
SPWR Datapackrelease
MC 1.21.4datapack
December 14, 2024

How to Install Monster Spawner Upgrades on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set datapack Loader

In the panel under "Egg", select the datapack loader and matching Minecraft version (1.21.4).

3

Install Mod

Open the mod browser in the dashboard and search for "Monster Spawner Upgrades". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

datapackfabricforgeneoforgequilt

Minecraft Versions

1.21.4

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Monster Spawner Upgrades server crashes on startup – what to do?

Most common cause: wrong datapack 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 (1.21.4). You can switch loaders with one click in the panel.

Is Monster Spawner Upgrades compatible with datapack and fabric and forge and neoforge and quilt?

Monster Spawner Upgrades officially supports datapack, fabric, forge, neoforge, quilt for Minecraft 1.21.4. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Monster Spawner Upgrades – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Monster Spawner Upgrades 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 Monster Spawner Upgrades with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
Create Server Now
1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.21.4