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
🪙 CHALLENGE YOURSELF against the NEW BOSSES OF THE WORLD!
Hazelia
Hazelia dimension, creatures, and boss!
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!
Epic Battle Music
Automatically adds epic battle music when fighting bosses with 200+ HP within 80 blocks.
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
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.
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.
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.
MRPG - Massive Role Play Game
This Modpack is an Fantasy RPG Modpack with many news like Biomes Weapons Bosses Structures Leveling System and more
Nice Huds
Bossbar Huds for players holding Clocks, Compasses and Recovery Compasses. Also adds a calendar/time based event system including seasons.
Crowncrawl
It is a mod still in development that aims to improve the vanilla experience of the game by adding new bosses and items.
Relics of Ruin
A custom weapon system featuring boss-themed swords with unique abilities and mechanics.
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.
Boss Checklist - Friends & Foes Compat
Adds Friends & Foes compatibility to the Boss Checklist mod!
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!
Daily Boss Per Player
Makes Daily Boss cooldowns per-player instead of server-wide.
Apotheosis Pack
The Apotheosis Pack is a comprehensive Minecraft modpack that maximizes magical progression through enhanced enchantments, epic boss battles, and deep strategic exploration.
Simple Boss Bars
The more beautiful solution to the vanilla boss bars!
Boss Crosshair-3
Crosshair with another Shape and with Shading
Matyah's Configs - Cobblemon Raid Dens Datapack
A datapack created for Cobblemon Raid Dens mod which adds new bosses and loot tables.
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

Fortitude
Gain stats upon defeating unique mobs and conquering bosses. Fully configrable/customizable.
Harsh Encounters
Adds custom strong bosses to the game.
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).
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.
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.
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.
Terra-Nova
Minecraft with bossfights, automation and physics!
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.
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.
The Titans
This Modpack add The Titans and other boss and titans mod!
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.
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.
Cobblemon Sky Adventure
Cobblemon but you are on Skyblock. Explore dimensions, fight trainers, fight boss. Create your own adventure !
Titans - World Bosses
Pixelmon World Boss Sidemod
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!