Minecraft Java 1.21 Mods
Browse 267 free mods for Minecraft Java 1.21 — popular picks include oCode-AnarchiaBosses, Elexir [CSD], The Angry Ghast.
Updated daily
oCode-AnarchiaBosses
Create custom bosses with skills, attributes, equipment and more!
Elexir [CSD]
Step into ELEXIR - This modpack is magic, automation and adventure. Here you can explore the world as well as magic or mechanisms to make life easier. Ancient artifacts, bosses other worlds are created for gameplay variety
The Angry Ghast
Three new Ghast themed bosses, one for each dimension
LOUIS BOSSES
VANILLA BOSSES DATA PACK
Explorisa
This modpack is centered around becoming stronger as you explore new structures, biomes, and even whole new dimensions, all the while defeating strong bosses, in a medieval/fantasy rpg setting.
Dangerous Nights
Every night without sleep makes the world more dangerous. Survive growing monster hordes, defeat minibosses, and earn stronger rewards as your streak rises.
Blood and Agony
Just a pack to have fun with friends, fight bosses, and level up together
NakamaCraftNeko
the modpack about tech and magic you can fight boss with friend
Void king dimension
Adds an epic boss fight with the Void King and his minions, spreading corruption, and powerful weapons.
Pandemonium Bosses
This data pack adds new fun bosses to fight
KolegxixPL Magic RPG
dive into this mysterious world with new creatures spells bosses and quests
Prismara
Dive into the fascinating world of Prismara, where magic and exploration come together. Explore vast biomes, face powerful bosses, and uncover the secrets of various schools of magic and witchcraft.
Klarian Chronicles Magic & Steel
Fantasy RPG modpack tailored for private server combining Better combat, legendary bosses, dragons, four magic paths, MineColonies kingdom building, Create automation, vampirism, and rich decorative building content.
Gabaland 3
A varied modpack that contains everything from exploration and bosses to nuclear reactors and magic!
TCC - Skyzone
An expert-mode 1.21.1 NeoForge skyblock pack with tech, automation, and magic (Mekanism, Create, Oritech, Ars Nouveau), exploration dimensions, and scaled-up Apotheosis difficulty for tougher mobs and bosses.
APackByRandomGuy (ABGF)
Over 200+ Bioms / More Tools, Weapons and Tec / New Bosses and Structures / More Buildingblocks
X Journey
Dive into TX-Journey, where survival meets adventure, all with the classic vanilla feel. Build, craft, and explore a world filled with mysteries, from daily tasks to epic boss battles. Upgrade your enchantments and uncover endless possibilities.
Grandia Dungeons
A dark fantasy roguelike dungeon adventure with classes, bosses, cursed loot, magic, traders and procedural floors.
Velorise EMC
A progression-focused EMC mod with transmutation, world tiers, alchemical machines, custom equipment, boss arenas, and endgame challenges.
ATMIL - All The Mods I Love
A mix of all the great and underrated mods, contain various weapons and bosses. Basically an RPG modpack.
Minecraft-The CATASTROPHE mod
Adds new bosses to the base game, and overhauls the progression
SpellCraft - Magic World
A Harry Potter-inspired magic mod adding wands, spells, wizard dueling, potions, a leveling system, magical creatures, a wizarding village with traders, and dungeons — including a boss lair and a dementor-guarded prison.
The Aether Survival
Here the goal is to survive starting in the Aether and work your way from defeating bosses in the aether to getting to the overworld
Darkest Garden
Adds a new boss to the Pale Garden!!!
Secret of the Ancient City: Echo Dimension
The mod adds a spooky Echo Dimension, custom structures, powerful echo-based tools and armor, unique functional blocks, dangerous natural spawns, and a major boss fight against the Echo Warden Monarch.

Hyrinity (Legacy)
An overall content mod adding progression, bosses, dimensions and more!
MCtale
Inspired by Hytale’s style, featuring colorful fantasy visuals, exploration-focused gameplay, RPG progression, dungeons, bosses, and a strong sense of adventure.
creeper-apocalypse
Mob Replacement System ALL mobs spawn as Creepers! with exceptions Exceptions that remain normal Blazes you still need blaze rods! Villagers or trading Ender Dragon final boss remains Iron Golem
BiiBiiCraft
A modpack focused on the Create mod, combining exploration, automation, and a variety of challenging world bosses in a richly diverse world.
Tales of the Third Age - Balrog
Adds a Balrog Boss to your Middle Earth modding experience!
Spells & Sorcery
Datapack that adds Spellbooks, Alchemy, New Items, New Mobs, and even a New Boss!
MythicRewards | Boss kill reward/drop plugin with custom rule support | 1.20.5+
MythicMobs Support - Top damage rewards - 6+ reward type built-in - Create your own reward rule
Legendary Enchantments[1.21-1.21.1]
Have fun with the new enchantments and the new boss!
Boss Update
This mod adds three new distinct bosses with custom drops and powers. (also available in multiplayer worlds.)

Prototype 0.3
currently just adds some custom armor and weapons not much. later there will be bosses, extra mobs, A third set of armor, even more weapons, maybe vehicles, and a lot more.
Crowned Herobrine [LEGACY]
Adds a new boss called Crowned Herobrine that is a formidable opponent. He drops a useful crown ;)