About Random Mob Effects
From Modrinth🎲 Randomly assign a (modded) potion effect to all hostile mobs in the world.
Random Mob Effects is a configurable mod created to make the game a little more difficult. Every hostile mob receives a random potion effect upon joining the world. There are a few potion effects disabled by default, but a blacklist is created on first load and you may change the values. The effect applied has a duration of the maximum integer value in java, which is 2147483647 ticks; around 30000 hours in-game. The particle effect can be disabled.
All available config options:
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potionEffectLevel default 1, min 1, max 50
The default level of the effects the mod applies, by default 1.
hideEffectParticles default false
When enabled, hides the particles from the mobs with an effect.
disableCreepers default true
Creepers can create infinite lingering potion effects which is probably not what you want. When enabled, the mod doesn't give creepers a random effect.
The default blacklist
is generated upon first load of the mod. It cycles through all potion effects within the Forge registry. This means that modded effects are supported, just make sure to refresh the config if a new mod with an effect is added. You can disable an effect by adding an exclamation mark (!) in front of the name.
The blacklist file is located in ./config/randommobeffects/ and is called blacklist.txt.
Hostile mobs with their random effects:
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You may freely use this mod in any modpack, as long as the download remains hosted within the CurseForge or Modrinth ecosystem.
Serilum.com contains an overview and more information on all mods available.
For issues, ideas, suggestions or anything else there is the Github repo. Thanks!
Highlights
From source dataGame versions
Supports 29 Minecraft versions, the newest being 26.3.
Loaders
Runs on Fabric, Forge, NeoForge and Quilt.
Footprint
Rated a light load on a server.
What kind of mod it is
From the catalogCreatures & NPCs
Adds or changes creatures, NPCs and how they behave.
Runs on your server
From source side supportModrinth lists Random Mob Effects as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- FabricForgeNeoForgeQuilt
- Runs on
- Serverrequired on the server
- Game versions
- 26.3 and 28 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-01Open ↗
- ✓AuthorSerilum, as published on Modrinth
- ✓LicenseLicenseRef-All-Rights-ReservedFree
