Minecraft Java 1.21 Mods
Browse 519 free mods for Minecraft Java 1.21 — popular picks include Boss Checklist - Mini Bosses Compat, The Old One, Boss Ultimatum.
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Boss Checklist - Mini Bosses Compat
Adds Warden to the Boss Checklist with mod compat.
The Old One
Adds a new boss. Also adds two new items and two new swords.
Boss Ultimatum
Heal bosses when players die, or remove them!
Trial Guardians
Procedural Trial Chambers and Bosses!
Dungeons Content 2
Dungeons Content II is a mod that adds content from a new game that has not yet been released and is a direct continuation of MCD. At the moment, only the new hostile mob Warden Boss is available
Beyond Bosses 2
This enderdragon overhaul will amaze you
Beyond Bosses
Beyond Bosses enhances the ender dragon boss introducing a new look to the end, a new ender dragon model, new boss attacks, and new boss music
✨Custom Bosses✨ A plugin to make your own mobs and Bosses✔️
A plugin to make your own mob. More features soon!
Daily Boss x L_Ender 's Cataclysm
Compatibility between Daily Boss and L_Ender 's Cataclysm.
Sensei Illager
Adds dojos and a Sensei Illager mini boss to cherry grove biomes.
Invincible: Overdrive
A Modpack base on the comic and TV show "Invincible", focusing on the mod "Invincible Conquest", bringing in challenging adventure with difficult mobs and bosses to conquer
Ascension of Ages
A curated progression pack across defined ages utilizing unique mod flavor, gated advancement, predatory revamped mob systems, tech & magic integrated by custom recipes throughout, and algorithm-designed boss placement required for progression in each age.
Realmwalker
Magical invaders roam the land - bosses, weapons, and loot!
Abyssal Corrupter
Face the terrifying Abyssal Corrupter — a multi-stage deep abyss boss that can be summoned via ritual altar in Minecraft 1.21.1 NeoForge.
Red Forest
Boss fights, quests, tasks, tools, and guns. Biomes and dimensions with 13+ mobs and 15+ structures and many more.
More Gear
This mod adds 15 new sets of armor and tools; four are based off of vanilla items and the rest off of new ores which can be found throughout the dimensions! There is also a new custom structure in the End dimension holding a new boss called the Shrike!
Daily Boss x Iron's Spells n Spellbooks
Compatibility between Daily Boss and Iron's Spells 'n Spellbooks.
The Nether Dungeons
I have added a dungeon that spawns at the depths of the nether which has a summing room where you have a chance to summon 3 different bosses.
Adventurer's Beyond
Explore lost structures. fight dangerous bosses, and journey to the beyond in this epic mod.
Nether Sentinel
Meet the Nether Sentinel: Minecraft's new Nether boss! Face this fiery challenge and prove your bravery in an epic battle.
Gateway of Doom
Throw a Devil Eye to open a configurable combat gateway. Survive random or fixed waves, bosses and timed challenges for rewards—or suffer debuffs. Includes auto gateways, custom mobs, profiles, admin menus, commands, diagnostics, plus a stable add-on API.
bosses' addition
a great challenge for those who are bored from vanilla, all in vanilla.
Slammer Boss
a mod that adds a new boss to the game
Ultimate Warden
A Datapack/Mod that enhances the Warden with a custom Dungeon, a Temple, boss battles, and more.
Confluence Infernum Music
Adds Infernum Music to Confluence: Otherworld (TerrariaCraft) bosses
The Catamount
The Catamount is a mix between an ambiance and a boss mod
Hostile Mob Better Configuration - HMBC
Hostile Mob Better Configuration gives you full control over hostile mobs in Minecraft. Attribute and behavior, or turn mobs into powerfupl boss variants to create a completely new difficulty and combat experience. Each mob can also have its own name.
Moar Bosses
Moar Bosses adds 7 types of randomly spawning bosses into your Minecraft world. Each boss has 3-5 unique and crazy magical attacks, and drop cores that can be used to craft magic wands. The bosses have custom textures using Optifine or Reselect or CET.
Hords
Hords is a survival mod for Minecraft that spawns dangerous mob hordes led by powerful bosses.
Daily Boss x Bosses of Mass Destruction
Compatibility between Daily Boss and Bosses of Mass Destruction.
Krakentilus
Adds the Krakentilus boss, 2 unique Nautilus variants and 3 spears
![Hollow Steve [HORROR]](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/modrinth/190570.webp)
Hollow Steve [HORROR]
Adds Hollow Steve, a horror stalker boss that haunts you, grows stronger after each defeat, and must be killed 10 times to survive.
Titans
This mod is made for those who love adventures. Adds new ore, materials, items, structures, and a boss
Nasir's Null Boss
Adds a new horrifying foe to your game...
Arda's Ultimate Golem
Arda's Ultimate Golem mod adds a powerful golem to the game, and this golem is a golem that helps you against bosses or creatures you fight.
True Boss Music
Adds much needed boss music to Minecraft's Bosses!