Minecraft Java 1.21 Mods
Browse 1,195 free mods for Minecraft Java 1.21 — popular picks include Holiday blocks, Nether chambers, Tranlate-Bosses of Mass Destrucion.
Updated daily
Holiday blocks
An immersive RPG exploration modpack featuring enhanced visuals, atmospheric sound, challenging bosses, and dynamic world generation, all optimized for smooth performance and engaging long-term gameplay.
Nether chambers
Adds custom trial chambers, mace, boss and items to the nether
Tranlate-Bosses of Mass Destrucion
Traduccion del ingles al español. Traducción no oficial
CobbleCatalyst
Adds Cobblemon trainer battle phases to Cataclysm boss fights, turning boss fights into hybrid combat and Pokemon battle challenges.
Pepegwoh 2 Now In Colors
Jump into a world filled with things to explore and magic to uncover. Can you defeat the bosses?
Bossbar - FREE
A multi-language and useful bossbar plugin with tpsbar.
Brian's Boss Items
Plugins that adds custom Boss Items
Inferno World
Dimension, epic boss battle, and tools inspired by a magical hell
VtAlters | ⭐ Advanced Boss Summoning System ⭐
Allows you to create a sacrificial altar to summon a mob
RoyRealTimeEvents
Minecraft plugin automatically creates special events (bosses, monsters) in real time during the day
Cobblemon YZ
Cobblemon pack filled with QoL/Performance mods. The included server has ALL pokemon, PvE trainers, bosses/raids, quests, hunts, breeding, outbreaks and more!
DayAnnouncer
Announce each Minecraft day with customizable titles, chat, boss bars, and sounds.
JuggernautSMP
JuggernautSMP is a competitive PvP minigame plugin for Minecraft (Paper 1.21) where one player becomes an overpowered boss — the Juggernaut — and everyone else must team up to take them down.
The last Soldier (TLS)
This mod adds rats, bugs, jellybears and bosses to the game
WarFmod
A mod that adds new mobs and bosses to your world, as well as new features and items.
Harrowing Hells (Data Pack)
[NOW SURVIVAL SUMMONABLE] Adds the Cinderscourge, a highly developed boss entity with a diverse arsenal of attacks at its disposal. Usable in mob battles.
Slot Highlight for CI Embossed Legacy
A custom slot highlight designed for CI Embossed Legacy. / Un resaltado de slots personalizado diseñado para CI Embossed Legacy.
Brian's Boss items resorcepack
Resourcepack of Brian's Boss Items plugin
Rocks & Monsters
A modpack which aims to weave boss fights with pokémon battles seamlessly. Features revamped nether and end progression!
TrollBossLite ⭐ The Ultimate Trolling Suite ⚡Funny Commands & Traps ⚙️
Troll your players like a BOSS: The ultimate suite with unique commands & GUI.
ProjectOverhaul
Overhauls Minecraft in different ways like adding new bosses, weapons, QOL Features, Structures, etc.
Cobblemon Tower Battle
The classic Battle Tower as a real building your players climb. Battle the statues floor by floor with locked teams, solo or co-op, infinite mode, boss floors and a podium that wears your champions' skins. Fully automatic, zero commands.
Elder Guardian Enhanced
Experience a cinematic multi phase Elder Guardian boss fight designed to feel like an official Minecraft update
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)
Arbiter
Server-side ground item cleaner for Fabric with bossbar countdown, TPS-aware emergency clearing, and per-dimension protection rules.
Big Weaponsmith
Replaces a Weaponsmith with the well-known Big Boss.
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.
Chaos Structures
Every 60 seconds, a random player is chosen and a random vanilla structure spawns nearby. Players receive countdown warnings and a bossbar timer, turning every world into unpredictable chaos.
Custom Boss Zoryth AI
Zoryth AI Boss is a premium, high-performance custom boss framework for Paper (1.21.x).
UniversalX CB
A power focused modpack packed with QOL features, bosses, and armor and weapons to battle them. While also maintaining 100+ FPS (new version coming soon)
Bosses drop Vault Keys
Makes Pixelmon Rare/Epic/Legendary/Ultimate bosses drop trial chamber vault keys
XDL的武器1
添加了几把武器和一些生物及一个BOSS Added several weapons, some creatures, and a boss.
GTBC's Cataclysmic Boss UI
Adds a pre-fight boss information screen with lore, mechanics, attack details and tips for L_Ender's Cataclysm bosses!
Minestroyer
This mod adds 13 more bosses to Minecraft.
CraftCore Modpack (Without Bossbar)
The official CraftCore Modpack 2025, without the Bossbar Overlay
Mantis World
This mod was developed by Murav4ik studios. This mod adds different insect bosses. Currently in fashion there are: ant mandible claw, Ant Lord boss.