Minecraft Java 1.21 Mods
Browse 267 free mods for Minecraft Java 1.21 — popular picks include ADKM, Inferno World, DreadWalker.
Updated daily
ADKM
Defeat a powerful, giant boss roaming your world to claim his legendary Scythe with +16 Attack Damage! A high-risk, high-reward challenge. (Requires GeckoLib)
Inferno World
Dimension, epic boss battle, and tools inspired by a magical hell
DreadWalker
A mod adding a new boss, new weapons, tools, armor, and a magic staff.
Artifacts and Bosses
This mod adds new gems that can be collected from 4 new bosses
WarFmod
A mod that adds new mobs and bosses to your world, as well as new features and items.
Sculk Wrath
Sculk Wrath is a complete Warden boss overhaul datapack that transforms the Warden into a 4-phase boss fight with custom attacks, boss bar, music, configurable drops, and dramatic animations.
The Legend Returns
Herobrine has returned. Cursed structures, shadow clones, epic boss fight, and dark portals await. Survive the apocalypse.
Raijin's Wrath
Unleash the wrath of Raijin — a Fabric adventure of thunder-forged gear, lightning-touched foes, summonable bosses, sacred shrines, and an in-game compendium guiding your ascent.
Accurate Craft
A performance-focused Minecraft modpack featuring enhanced visuals, quality-of-life improvements, new structures, epic boss fights, and expanded building possibilities.
Antique Odyssey
A progression-focused adventure modpack where ancient magic, powerful relics and mechanical engineering shape your journey. Explore a world filled with dangerous bosses, forgotten ruins, powerful spells and intricate machinery.
Nation's Roots
Nation's Roots - a mod where you choose one of 4 Races with unique Nations. Your choice grants powers and flaws. Find a Star to change your Nation and defeat a race boss to claim their legendary weapon. Your roots define your power.
Creations Of Tygrys
Mod made for fun, adding new boss, dimension and structures!
AETO's
A modpack focused on exploration and automation using Create: Aeronautics, also featuring magic and many bosses!
Cake Tower HUD Plus
HUD overhaul and optional server-side combat stats for the Cake Team Towers · Chapter 3 map—health, hearts, resources, team/mob 3D bars, stats panel, boss-bar toggles; v6+ damage attribution, K/A/D taken, DPS, session history. Auto-hides elsewhere.
Bosses Reimagined
This is release of Bosses Reimagined. It is release but ,if you have any bugs you can message me.
HARD NEW
A technologically advanced game with a focus on realism! Shaders, automation, smart NPCs, hundreds of animals, and hardcore bosses. Explore this vibrant world with your friends using the built-in voice chat.
ryoumod
Get ready for the ultimate journey! ⚔️ This modpack combines an epic RPG experience with brutal challenges: face colossal bosses 👹 and explore completely remastered Nether and End dimensions that will blow your mind 🌌. If you’re into tech, master advance
Anti Magick: Bosses of Mass Destruction
Optional Anti Magick integration that suppresses selected supernatural boss actions and summons
Trick Quiver
An archery combat mod: switch between 12 magic arrows, craft bow attachments, battle clockwork archers, and raid a Japanese-style boss shrine. One arrow solves everything.
BossySky
Polish Author's Boss Plugin for your Minecraft server!
Anti Magick: The Twilight Forest
Optional Anti Magick integration that suppresses Twilight Forest portals, magic abilities, summons, and selected boss actions
Telum Solaris - At the Forest's Edge
Telum Solaris aims to add new weapons, armor and boss to minecraft for every stage of minecraft's progression. It is currently my first and only project!
Attack Mastery
Grindy attack skill progression! Kill levelled mobs to level up your Attack Mastery (max 200), gaining up to +1000% damage. Bossbar tracks XP — perfect for RPG servers with Levelled Mobs!
Artisan
A whole new experience to Minecraft, adding new progression, magic, bosses, rpg elements, and so much more to discover.
Chariz's Mayhem
A Minecraft Mod That Aims To Add Fun Things Into Minecraft, Such As New Mobs, Bosses, Weapons, Tools, Armor etc. Created By The Maniac Himself, DarkChariz
NxControl
NxControl is an advanced staff plugin that lets OP players control players or mobs using simple keybinds, with GUI, bossbars, and freeze system built-in. It’s lightweight, powerful, and perfect for moderation, trolling, or cinematic gameplay.
SuperGem
Add a new ore, new capacities, new miniboss
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.
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.
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.
Calamity Bosses
20 NEW bosses that will shift the power changes in your world, adding custom item rewards and custom blessings to ease your fare through this treacherous world.
Boss Cannon
The Boss Cannon Inspired By WMC
Endmode 2 | Terraria Style Datapack
Terraria inspired overhaul to progression. New bosses, items, etc.
Tensura Cataclysm Loot Data Pack (1.21.1) – Earn Rare Magic Drops
Tensura Cataclysm Loot Data Pack adds items from the Tensura: Reincarnated mod to mob drop tables in L_Ender's Cataclysm. Defeating powerful bosses and dungeon monsters rewards you with elemental essence, cores, shards, and magic ores. Each Cataclysm structure matches its thematic element, giving you clear targets when farming specific materials. This integration helps connect combat […]
Kult Craft Core Data Pack (1.21.1, 1.20.1) – Fight Custom Bosses Without a Long
Kult Craft Core Data Pack extends the Attribute Setter Mod by balancing health and damage numbers for several other mods. The pack lowers the health of specific boss-like monsters so they do not take forever to defeat in regular survival gameplay. Features: Changes the health stats for specific creatures from different mods so they fit […]
Spell Utils Mod (1.21.1) – Library for Iron's Spells and Spellbooks Addons
Spell Utils Mod is a utility API designed to help developers create addons for Iron's Spells and Spellbooks Mod. It provides ready-to-use systems, classes, and tools that simplify the process of building custom spells, mobs, and bosses. This mod is mainly intended for mod developers, not regular players. Features: Mob & Boss Systems Custom spellcasting […]