Minecraft Java 1.21 Mods
Browse 516 free mods for Minecraft Java 1.21 — popular picks include YouTuber Block Telugu Edition, Steve's Custom Bosses Data pack, ServerWardenFight.
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YouTuber Block Telugu Edition
A fun Minecraft mod featuring famous Telugu YouTubers, custom blocks, and epic bosses like Evil YouTube
Steve's Custom Bosses Data pack
This data pack adds custom recipes, advancements, challenges, and bosses to the game, all with vanilla mechanics!

ServerWardenFight
This plugin spawns a Warden at worldspawn once per day at a random time between 11 AM and 8 PM, broadcasting its arrival and tracking its health in a bossbar. It can also be spawned manually, and the killer earns 750–1500 Vault dollars, announced in chat
EpicMobs
mobs, boss, dungeon, skills

Bosses Reimagined
This is release of Bosses Reimagined. It is release but ,if you have any bugs you can message me.
Jeff: The Awoken Core
Face Jeff, a late-game raid boss who tests your skill, strategy, and timing to earn powerful loot and master Minecraft combat
Chronotide
A time-bending dimension mod filled with fractured biomes, echoing bosses, and mysterious relics. AI-designed mod.
Cooper age
mod adds 2 metals and 1 alloy. You can make weapons, tools and armor with them. There is still 1 boss
Creations Of Tygrys
Mod made for fun, adding new boss, dimension and structures!
Olympus Rush
Climb a hand-sculpted Olympus and slay its thirteen gods — God of War-style boss battles with the Blades of Chaos, and Hades waiting on his throne beneath the world.
Custom Boss Template
Easy custom boss template for Minecraft 1.21+. Fully configurable health, name, appearance, phases, attacks, messages and rewards. Perfect for adventure maps and servers.
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.
Otherplaces
Multiple dimentions with diffrent items, blocks, mobs, structures, bosses.
BossySky
Polish Author's Boss Plugin for your Minecraft server!
The Protector
Add a BOSS, named The Protector and stuff bout him
Osimu Boss Fights
This mod adds very unforgiving bosses and cool rewards. Most of them will be glass cannons, strength alone won't be enough.
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.
The Legend Returns
Herobrine has returned. Cursed structures, shadow clones, epic boss fight, and dark portals await. Survive the apocalypse.
Dynamic Difficulty More Hard
Level Adjustment for Mobs and Bosses in the DENLAND Modpack by Guzk
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!
⚡EvilMobs - Create your custom bosses
Multifunctional Bosses with simple configuration
Monsterwalll's Bosses And Stuff
A mod I made that adds Bosses, Structures and more! Note that this is my first mod so please comment what you think should be fixed in future mods.
Endorium Mod
Endorium is an end-game expansion mod for Minecraft that introduces a new mini boss, new wood type and new tier of equipment beyond Netherite.
chicken boss
Adds a powerful God Chicken boss that attacks players by spawning creepers and iron golems.
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.
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!
BulsciCraft
Enjoy this brand new mod that adds New Dimensions, Mobs, Items, Blocks, Unusual things and even a bossfight...
Magma Craft Remastered
A small mod adds: new biome, new ores, new structures, new boss, new tools, and more!
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.
Boss Radar
Craft a special compass that senses powerful mobs lurking nearby. Hold it to see a color-coded ring around your crosshair with the boss's name and distance, turning red as danger closes in — perfect for staying alert to the Ender Dragon, Wither, Warden
ThicMobKai - Dungeon, Boss and Mob RPG System
A premium dungeon, boss, and mob progression plugin with EN/VI support.
Berry's Land
**Berry's Land** is an adventure mod that introduces a beautiful new dimension with custom progression, unique creatures, giant trees, Compote Rivers, and an exciting boss fight. Discover a mysterious world and earn powerful rewards!

ArenaWaves
Simple wave arena with bossbar progress and vanilla mobs.

randomitems-mod
Adds /randomitems, /randommobs, /randomweapon, /randomarmor, /randomtool and /randomquest commands that periodically give random items, spawn random mobs, swap your gear, or assign 5-minute random quests with a boss bar and personal sidebar.
néant+
Adds a new dimension and mobs, bosses. With ores and armor to match. The mod has a dark visual theme.
Floreláis
Created in 1 week for my high school art class. It is a very basic mod adding 6 flowers and a boss. Similar feel as old 1.7.10 mods.