Minecraft Java 1.21 Mods
Browse 515 free mods for Minecraft Java 1.21 — popular picks include Project: TitanSlayer, Mid Optimized Plus+, Chill&Stay.
Updated daily
Project: TitanSlayer
Slaughter Mobs and Bosses in a Doom Style
Mid Optimized Plus+
it's Mid Optimized but with extra mods adding new bosses , mobs , biomes and more..
Chill&Stay
This is a modpack for my private smp, includes new building blocks, new foods, mobs some new bosses and enemys, a lot of QoL features, and the necessery optimanizations
Nether chambers
Adds custom trial chambers, mace, boss and items to the nether
CobbleCatalyst
Adds Cobblemon trainer battle phases to Cataclysm boss fights, turning boss fights into hybrid combat and Pokemon battle challenges.
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
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.
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)
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.
Elder Guardian Enhanced
Experience a cinematic multi phase Elder Guardian boss fight designed to feel like an official Minecraft update
Rocks & Monsters
A modpack which aims to weave boss fights with pokémon battles seamlessly. Features revamped nether and end progression!
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.
Custom Boss Zoryth AI
Zoryth AI Boss is a premium, high-performance custom boss framework for Paper (1.21.x).
Minestroyer
This mod adds 13 more bosses to Minecraft.
DreadWalker
A mod adding a new boss, new weapons, tools, armor, and a magic staff.
Rare Mob Item -warden-
The purpose of the mod called RMI (rare mob item) is to make the bosses in the game more useful.
HereMobby
A paper server plugin to create custom entities (mobs, bosses, reward items, craftable items, mounts, wild animals)
Matthew's adventure
The Hardwood Forest biome is a forest with dark hardwood trees and Ironbugs that drop iron nuggets. Players can tame a mob inspired by me using honey blocks and fight a boss named after my friend in the plains biome. Craft and discover many unique items.
Esoteric
Animations, Visual Effects, Terrian Enhancements + Structures. This pack also includes rebalancing of bosses. which makes some mobs + bosses more difficult
Artifacts and Bosses
This mod adds new gems that can be collected from 4 new bosses
Zombieium
Zombieium adds configurable night-time zombie waves and an optional boss encounter with a red warning beam, fiery arrival effects, and unique drops.
Mob Icons+
Hostile mobs become easier to recognize at a glance with clean pixel face icons for UI elements, boss bars, and compatible minimaps.
MehrPinguin
A mod adding penguins, biomes, structures, rituals, and bosses – currently only available in German language.
BossBarUltra
Modern floating health bars for mobs using Minecraft’s TextDisplay system. Lightweight, customizable, and perfect for RPG and PvE servers.
Vitae
Vitae is a data-driven entity framework for NeoForge 1.21.1 that lets you define custom animated mobs, bosses, and NPCs through datapacks and optional KubeJS scripting.
BossHeart
A mode that makes playing more comfortable
candyrush
CandyRush is an exciting team-based treasure hunting game where players compete to collect the most points! Join one of four teams, explore the map, find treasure chests, defend NPCs from monsters, and battle epic bosses to become the ultimate champion!
The game Built For YOU
This modpack is somewhat "lightweight" this adds a few new mobs bosses and features have fun!
Folded Iron
A boss/item/weapon/after game content mod
Raijin's Wrath
Unleash the wrath of Raijin — a Fabric adventure of thunder-forged gear, lightning-touched foes, summonable bosses, sacred shrines, and an in-game compendium guiding your ascent.
MOAR Tools
MOAR Tools is a progression and combat expansion mod that adds three new gear tiers, two dungeon systems, a full boss encounter, and a suite of custom mobs all designed around a dark, End-themed aesthetic.