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Minecraft Java 1.21 Mods

Browse 10 free mods for Minecraft Java 1.21 — popular picks include EliteMobs, Invincible: Overdrive, All About Mobs - Creatures & Bosses & Combat.

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EliteMobs
1.21.4

EliteMobs

Minidungeons, Arenas, Bosses, Custom Loot, Quests, MMORPG progression & more!

69kdownloads
Invincible: Overdrive
1.21.1neoforge

Invincible: Overdrive

A Modpack base on the comic and TV show "Invincible", focusing on the mod "Invincible Conquest", bringing in challenging adventure with difficult mobs and bosses to conquer

14kdownloads
All About Mobs - Creatures & Bosses & Combat
1.21.4neoforge

All About Mobs - Creatures & Bosses & Combat

All About Mobs enriches your Minecraft experience by adding a plethora of new creatures to discover and interact with, enhancing the dynamics of each biome.

2.6kdownloads
Grace999
1.21

Grace999

GracePlugin provides configurable, per-world grace periods with PvP and mob damage protection, boss bar countdowns, sound alerts, and customizable safe zone regions with flag-based protections.

2.1kdownloads
[MobArena Addon] HavenArena - Extra Customizable Features
1.20spigot

[MobArena Addon] HavenArena - Extra Customizable Features

Add extra customizable features to your MobArenas, including new boss abilities and monster glow.

1.2kdownloads
Basalt Arena
1.21.1neoforge

Basalt Arena

This mod adds 3 new bosses and a new structure to Minecraft.

683downloads
JuggernautSMP
1.21

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.

135downloads
ArenaWaves
1.16.5

ArenaWaves

Simple wave arena with bossbar progress and vanilla mobs.

42downloads
Voidshard_abyss
1.21.4neoforge

Voidshard_abyss

The Voidshard abyss mod adds the voidshard abyss dimension, bosses and arena battles.

38downloads
Twilight Tavern
1.21.1neoforge

Twilight Tavern

Magical, cozy cottage? Or a dark wizard dungeon? Your choice! No futuristic automation mods. The modpack is a curated mix of magical, fantasy and farm related mods with challenging, dark outside world full of monsters and bosses.

1.3kdownloads