Minecraft Java 1.21 Mods
Browse 1,192 free mods for Minecraft Java 1.21 — popular picks include valhalla, The Fallen King - Ultimate Survival Challenge, Shwarma Adventures.
Updated daily
valhalla
Lots of norse-themed items, tools, bosses and more!
The Fallen King - Ultimate Survival Challenge
Extreme Bosses, Ninja Enderman AI & The Fallen King Dragon Phase.
Shwarma Adventures
An adventure-focused Minecraft modpack featuring exploration, bosses, dungeons, enhanced world generation, and a balanced progression system.
Boss Weapons Mod
This is my first mod, so it's probably not very good. It adds some weapons for each mob that is generally considered a boss (Wither, Ender Dragon, Warden, and Elder Guardian).
Daniels Amazing Uranium Mod
This mod adds uranium, a boss named Daniel, and MUCH MUCH more! enjoy :-)
The RED KING
This is a mod made with Autoforge. It contains a BOSS that can be naturally summoned called "The Red King".
SuperGem
Add a new ore, new capacities, new miniboss
AutoRoutine
AutoRoutine is a Minecraft plugin that automatically restarts your server on a schedule, with chat, bossbar, and actionbar notifications, sound alerts, and HEX color support.
Empowered Armory
This mods adds addition weapons, items, weapons, tools, blocks, bosses and armor
Custom Entity API
A datapack API allowing anyone to add custom entities, or bosses, to Minecraft: Java Edition, powered by Animated Java.
Tenebris - Advanced Dungeon System
Free advanced dungeon system with bosses, keys, rewards, stats, MythicMobs and PlaceholderAPI suppor
☣ THE PLAGUE CARRIER ☣ - Epic Mutating Zombie Boss
A twisted titan of decay that spreads plague and devastation across the land
⚡ cBroadcast – Beautiful Announcements (Chat, Title, Bossbar, Actionbar) | 1.16–1.21
⚡ Make your announcements unforgettable – in chat, titles & more!
Endil's Maestro
Adds thematic music to bosses, powered by Maestro!
Bossbar Day-counter
Adds a day counter and displays it in the boss bar.
VulcanicBoss | Advanced World Boss System
plugin,boss
Perfect LeaderBoards
Create awesome leaderboards to show who's boss in your Minecraft server!
Celestial Depths
This mod adds a bunch of new features such as, A new Dimension called The Astral Realm, New tools and ore, a new biome called the Celestial Wastelands, and a new mini boss called the Celestial Golem.
Item Challenge
Give your server a collective goal: collect a set amount of any item before the in-game days run out. Track progress in real time through a boss bar, deposit your items in one command, and see who contributed the most.
Larp Craft Modpack
Vanilla+ Fabric SMP featuring Terralith, YUNG's Better Structures, Bosses of Mass Destruction, End Remastered, Farmer's Delight, and quality-of-life improvements. Minecraft 1.21.1.
Endless Instability
This mod changes many stages of Minecraft, adding new blocks, tools, and bosses. It's not yet finished and is in early development. It's 70% translated into English and 100% into Russian.
Everything Bossbar UW add-on
This Datapack adds Bossbars for every mob
VS-Announcements
A plugin for announcements in Chat, Title, and BossBar
The Invisible Cheater
There's a new boss in the world
DayTimeBar
Displaying the time of day in the bossbar
MashStrikeDrops
The plugin is aimed at event servers, crates-style mob encounters, grind zones, boss-lite content, and custom reward systems without needing MythicMobs or a larger RPG stack.
WelcomeRewards - Make Welcoming Rewarding!
Reward players for welcoming new members with an interactive BossBar system!
MMLeader
Keep track of who defeated the boss for the first time!
BoosterAddOn Bossbar
AddOn for Booster to show active Booster in Bossbar
MCHeldenUltimate
Community-driven Minecraft Helden inspired PaperMC plugin featuring Hearts, Teams, Economy, Bosses, Events, Elimination Systems and Premium Extensions for Minecraft 1.21+.
Lama Party - Vote-Based Boss Event Plugin
Transform your server's voting system into an epic boss battle event!
⭐AMGHud ⭐ Bossbar HUD, TAB List ⭐
Bossbar HUD, TAB List
Amboss Haltbarkeit / Anvil Durability
Always see the remaining durability of your anvil.
AzurealDamaGE
This plugin displays a player's damage and health information in the boss bar when you hit them on PvP servers. It only has one version and is compatible with Paper version 1.21, but you should download and try it anyway.
![️ Arachnid Queen Boss - Epic 4-Phase Spider Battle [AI-Customizable]](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/spiget/166612.webp)
️ Arachnid Queen Boss - Epic 4-Phase Spider Battle [AI-Customizable]
Metamorphosis mechanic, explosive minions, web traps & berserker mode!
Lumo (FREE) | KI-Chat mit Groq API (LLM) | Multilingual | Bossbar | Logging
ChatBot | KI-Chat | Lumo | Multilingual