CurseForge · Minecraft mod
Brutal Bosses - Custom Bosses
Adds 29+ Bosses to dungeons and structures. Allows custom boss creation through datapacks
Quick answer
Which Brutal Bosses - Custom Bosses release should I use?
Brutal Bosses - Custom Bosses brutalbosses-1.21.1-8.6.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 1 required mods have matching files.
Where it goes
Is Brutal Bosses - Custom Bosses required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Brutal Bosses - Custom Bosses brutalbosses-1.21.1-8.6.jar need?
brutalbosses-1.21.1-8.6.jar. Change the file and its required mods may change too.
Install Cupboard first. We found matching files for this game-version and loader setup.
We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Brutal Bosses - Custom Bosses without breaking your instance.
Built for Brutal Bosses - Custom Bosses brutalbosses-1.21.1-8.6.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use brutalbosses-1.21.1-8.6.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Cupboard first. We found matching files for this game-version and loader setup.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside brutalbosses-1.21.1-8.6.jar. It opens that exact file at the source.
About this project
What does Brutal Bosses - Custom Bosses add?
Dungeons and other structures now have bosses spawning in them, more than 29 boss variants of vanilla entities
These bosses have custom abilities, stats, loot and behaviour/AI so each one is a different challenge.Requires Cuboard dependency to be installed in newer versions
All bosses are created through datapacks, by default the mod already includes 29 Bosses.
They're fully customizable and you can add new bosses yourself easily. You can make a boss of about any entity, including other mod's entities.
Commands for testing bosses:
/brutalbosses spawnboss all spawns all bosses
/brutalbosses spawnboss random spawns a random boss
/brutalbosses spawnboss <filename> spawns a specific boss
This mod is compatible with any structure which adds lootable chests/containers, due to bosses spawning next to those chests.
Structures which are using vanilla loottables are inherently compatible, others may be added explicitly through datapacks.
Includes compatibility for the following structure mods by default:
Awesome Dungeon
Awesome Dungeon Edition Ocean
Awesome dungeon nether
Awesome dungeon end
Bygone Nether
Dungeon Crawl
Dungeons Enhanced
Dungeons Plus
End Remastered
Goblins & Dungeons
Illagers+
Infernal Expansion
It takes a pillage
Mo' Structures
Phillips ruins
Stoneholm, Underground Villages
The Graveyard
The Lost castle Towns and Towers
Towers of the Wild: Reloaded
Towers of the Wild: Additions
Valhelsia Structures
When Dungeons Arise
William wythers
YUNG's Better Dungeons
YUNG's Better Strongholds
Missing a mod? you can easily add it with a datapack, check the spawning section of the boss creation guide: https://gist.github.com/someaddons/aa5986b9495863c3b55947a07e243395 List of all bosses:




























Project description from CurseForge.
Pick your setup
Brutal Bosses - Custom Bosses by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
2 loader builds1.21
2 loader builds1.20.1
3 loader builds1.20
3 loader builds1.19.2
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Brutal Bosses - Custom Bosses versions and loaders
brutalbosses-1.21.1-8.6.jar
22 Feb 2026
brutalbosses-1.21-8.5.jar
20 Feb 2026
brutalbosses-fabric-1.21-8.5.jar
20 Feb 2026
brutalbosses-fabric-1.20.1-8.5.jar
20 Feb 2026
brutalbosses-1.20.1-8.5.jar
20 Feb 2026
brutalbosses-fabric-1.21-8.4.jar
18 Sept 2025
brutalbosses-fabric-1.20.1-8.4.jar
18 Sept 2025
brutalbosses-1.21-8.4.jar
18 Sept 2025
brutalbosses-1.20.1-8.4.jar
18 Sept 2025
brutalbosses-fabric-1.21-8.3.jar
5 Sept 2025
brutalbosses-fabric-1.20.1-8.3.jar
5 Sept 2025
brutalbosses-1.21-8.3.jar
5 Sept 2025
Looking for an older file? The official CurseForge project page is in Resources.