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Minecraft Java 1.21 Mods

Browse 1,188 free mods for Minecraft Java 1.21 — popular picks include Bosses'Rise I Excalibur, Hazelia, Cobblemon Origins Modpack.

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Bosses'Rise I Excalibur
1.21.1neoforge

Bosses'Rise I Excalibur

🪙 CHALLENGE YOURSELF against the NEW BOSSES OF THE WORLD!

3.8kdownloads
Hazelia
1.21.1neoforge

Hazelia

Hazelia dimension, creatures, and boss!

3.7kdownloads
Cobblemon Origins Modpack
1.21.1fabric

Cobblemon Origins Modpack

The best Cobblemon Modpack for performance, aesthetic and QOL features that you'll ever see. The server includes Raids, Ranked, Bosses, Player Gyms, Breeding, Cosmetics and so much more custom features!

3.7kdownloads
Epic Battle Music
1.21fabric

Epic Battle Music

Automatically adds epic battle music when fighting bosses with 200+ HP within 80 blocks.

3.7kdownloads
KamenRiderBossYOUandME
1.21.1neoforge

KamenRiderBossYOUandME

Henshin! Step into this heated conflict. In “The Final Boss, You and Me”, it's like the fateful duel of Kamen Riders. The shining belt is the symbol of glory. Amid the intertwining of light and shadow, only the strongest can break through the darkness

3.7kdownloads
Harrowing Hells
1.21fabric

Harrowing Hells

[NOW SURVIVAL SUMMONABLE] Adds the Cinderscourge, a highly developed boss entity with a diverse arsenal of attacks at its disposal. Usable in mob battles.

3.6kdownloads
DS-Ads | [ ⏳ Velocity, Bungee, ActionBar, BossBar, Chat & Title Ads ⏳ ] | [1.18.2 - 26.1.2] ⭕
1.18spigot

DS-Ads | [ ⏳ Velocity, Bungee, ActionBar, BossBar, Chat & Title Ads ⏳ ] | [1.18.2 - 26.1.2] ⭕

Create, manage, and send advanced announcements to your players for Bungee, Spigot & Velocity.

3.5kdownloads
Sol's Title System
1.21.11neoforge

Sol's Title System

A rich title progression system. Players earn titles by completing in-game achievements — slaying mobs, surviving, or defeating powerful bosses. Each title displays above the player's head and in chat, and can grant unique stat buffs while equipped.

3.5kdownloads
MRPG - Massive Role Play Game
1.21.1fabric

MRPG - Massive Role Play Game

This Modpack is an Fantasy RPG Modpack with many news like Biomes Weapons Bosses Structures Leveling System and more

3.5kdownloads
Nice Huds
1.21.5

Nice Huds

Bossbar Huds for players holding Clocks, Compasses and Recovery Compasses. Also adds a calendar/time based event system including seasons.

3.5kdownloads
Crowncrawl
1.21.1neoforge

Crowncrawl

It is a mod still in development that aims to improve the vanilla experience of the game by adding new bosses and items.

3.4kdownloads
Relics of Ruin
1.21.11fabric

Relics of Ruin

A custom weapon system featuring boss-themed swords with unique abilities and mechanics.

3.4kdownloads
Compound V: Survival Crafting & Chest_Loot Addon
1.20.1fabric

Compound V: Survival Crafting & Chest_Loot Addon

Compound V: Survival Crafting & Exploration Addon adds Overworld crafting recipes and balanced structure loot tables for Temp V, Permanent Compound V, and Anti-V serums, removing the need for endgame boss fights.

3.3kdownloads
Boss Checklist - Friends & Foes Compat
1.20.1fabric

Boss Checklist - Friends & Foes Compat

Adds Friends & Foes compatibility to the Boss Checklist mod!

3.3kdownloads
Cobblemon + Create - Pokemon meets Industrial Revolution!
1.21.1neoforge

Cobblemon + Create - Pokemon meets Industrial Revolution!

A hardcore, expert-level modpack fusing Cobblemon, Create, and Cataclysm into one inseparable system | Custom Recipes | Complex Progression | All Pokémon | Mega Evolutions | Gyms & Badges | Boss Fights | Everything Integrated!

3.3kdownloads
Daily Boss Per Player
1.21.1neoforge

Daily Boss Per Player

Makes Daily Boss cooldowns per-player instead of server-wide.

3.3kdownloads
Apotheosis Pack
1.21.1neoforge

Apotheosis Pack

The Apotheosis Pack is a comprehensive Minecraft modpack that maximizes magical progression through enhanced enchantments, epic boss battles, and deep strategic exploration.

3.3kdownloads
Simple Boss Bars
1.13

Simple Boss Bars

The more beautiful solution to the vanilla boss bars!

3.2kdownloads
Boss Crosshair-3
1.20.2

Boss Crosshair-3

Crosshair with another Shape and with Shading

3.1kdownloads
Matyah's Configs - Cobblemon Raid Dens Datapack
1.21.1

Matyah's Configs - Cobblemon Raid Dens Datapack

A datapack created for Cobblemon Raid Dens mod which adds new bosses and loot tables.

3.1kdownloads
Boss Checklist - Voidscape Compatibility
1.21.1neoforge

Boss Checklist - Voidscape Compatibility

Integrates the augmented Null Servant bosses as well as the Corrupted Pawn from Voidscape as entries in the Boss Checklist mod

3.1kdownloads
Fortitude
1.21.1neoforge

Fortitude

Gain stats upon defeating unique mobs and conquering bosses. Fully configrable/customizable.

3.1kdownloads
Harsh Encounters
1.21.1neoforge

Harsh Encounters

Adds custom strong bosses to the game.

3.0kdownloads
Daydream: Glittering
1.21.1neoforge

Daydream: Glittering

This is a relatively simple yet comprehensive adventure-oriented Minecraft mod, featuring some new weapons, equipment, and bosses. Most of its content consists of the author's own little clever touches (questionable).

3.0kdownloads
Improved Spiders
1.21.5

Improved Spiders

Adds 4 new types of spiders that can spawn as well as a spider queen boss that spawns in new spider den structures and many new items.

3.0kdownloads
Confluence: Of another World and Create
1.21.1neoforge

Confluence: Of another World and Create

A carefully balanced modpack combining Create-based engineering with boss-driven progression and new dimensions from Confluence: Otherworld. Explore, automate, and fight your way through a living world.

3.0kdownloads
Random Bosses
1.21.9

Random Bosses

The WASD Random Bosses Datapack turns naturally spawned mobs in the world into bosses. It was inspired by an old mod that is similar in function. Bosses spawn with random power levels, random sizes, and loot based on difficulty.

2.9kdownloads
Terra-Nova
1.20.1forge

Terra-Nova

Minecraft with bossfights, automation and physics!

2.9kdownloads
Contoro's Ores+
1.21.1neoforge

Contoro's Ores+

This mod adds ores and new tools and armor, but with a twist. The player needs certain leveled tools to get stronger ores. This mod also adds a new dimension and a new boss.

2.8kdownloads
Cobblemon Dungeon
1.21.1fabric

Cobblemon Dungeon

Create and edit custom Cobblemon dungeons directly in-game with areas, gates, trainer encounters, boss battles, Join NPCs, rewards, and JSON-based advanced customization.

2.7kdownloads
The Titans
1.21.1forge

The Titans

This Modpack add The Titans and other boss and titans mod!

2.7kdownloads
Pirate Adventures
1.21.4

Pirate Adventures

Pirates is a huge project for the Minecraft game in the form of a DataPack. By installing the required ResourcePack and the DataPack itself, you get a large number of new mobs, items, blocks, mechanics, and bosses.

2.7kdownloads
Zombie Survival Mod (ZSM)
1.21.4fabric

Zombie Survival Mod (ZSM)

Survive for 10 days fighting zombies with unique abilities. As the days progress, stronger zombies spawn, culminating in a final boss. Players can craft items, build defenses, and face various challenges to stay alive.

2.7kdownloads
Cobblemon Sky Adventure
1.21.1neoforge

Cobblemon Sky Adventure

Cobblemon but you are on Skyblock. Explore dimensions, fight trainers, fight boss. Create your own adventure !

2.7kdownloads
Titans - World Bosses
1.21.1neoforge

Titans - World Bosses

Pixelmon World Boss Sidemod

2.7kdownloads
LifeSteal Launcher
1.21.4fabric

LifeSteal Launcher

LifeSteal Dungeon: The official 1.21.4 MMORPG Modpack! Dive into a pure action dungeon. Master special attacks and face epic bosses. Optimized for performance. Download and join play.lifestealmc.fr for an intense MMORPG adventure!

2.6kdownloads