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Minecraft Java 1.21 Mods

Browse 14 free mods for Minecraft Java 1.21 — popular picks include Mob AI Tweaks, Incendium Biomes Only, Moar Bosses.

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Mob AI Tweaks
1.21.11fabric

Mob AI Tweaks

Tweaks certain mob AIs, major or minor. Reworks the Wither and Ender Dragon boss fights!

1.4Mdownloads
Incendium Biomes Only
1.21neoforge

Incendium Biomes Only

Removes structures, items, mobs and bosses from Incendium, leaving only the biomes and terrain.

1.2Mdownloads
Moar Bosses
1.21.9

Moar Bosses

Moar Bosses adds 7 types of randomly spawning bosses into your Minecraft world. Each boss has 3-5 unique and crazy magical attacks, and drop cores that can be used to craft magic wands. The bosses have custom textures using Optifine or Reselect or CET.

8.3kdownloads
Daily Boss x Cobblemon
1.21.1neoforge

Daily Boss x Cobblemon

DBxCobblemon is a compatibility bridge provided to integrate [DailyBoss] with [Cobblemon]

655downloads
Mine RPG
1.21.1fabric

Mine RPG

This is combination of mods to add more content to Minecraft including bosses, biomes, creatures. This is more RPG adventure style while keeping all vanilla. No extra metals or materials are added on this pack.

318downloads
Fortune Craft Modpack
1.21.1neoforge

Fortune Craft Modpack

The Official Modpack for the FortuneCraft Modded Server. Explore Minecraft in a new light with a heavy focus on Create, with the addition of new Biomes, Blocks, Mobs and Bosses!

239downloads
Godmode- wither rework
1.21.4neoforge

Godmode- wither rework

This mod entirely reworks the wither boss in minecraft, with custom loot, moveset, etc

166downloads
Mid Optimized Plus+
1.21.1fabric

Mid Optimized Plus+

it's Mid Optimized but with extra mods adding new bosses , mobs , biomes and more..

157downloads
Chill&Stay
1.21.1fabric

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

152downloads
Custom  Boss Zoryth AI
1.21.11

Custom Boss Zoryth AI

Zoryth AI Boss is a premium, high-performance custom boss framework for Paper (1.21.x).

106downloads
The game Built For YOU
1.21fabric

The game Built For YOU

This modpack is somewhat "lightweight" this adds a few new mobs bosses and features have fun!

94downloads
King of the Nether Resource Pack (1.21.8) – Dark Wither Army for the Underworld
1.21.8

King of the Nether Resource Pack (1.21.8) – Dark Wither Army for the Underworld

King of the Nether Resource Pack transforms the look of monsters in the fiery dimension. It changes these creatures so they match the style of the Wither boss. This pack gives the underworld a darker and scarier vibe by making the mobs look like they belong to a single dark army. You will need OptiFine […]

Neo The Titans Mod (1.21.4) – Discovering The Titan Gods of Minecraft
1.21.4neoforge

Neo The Titans Mod (1.21.4) – Discovering The Titan Gods of Minecraft

Neo The Titans Mod is a Minecraft mod that introduces powerful, genetically enhanced Titan bosses. It recreates the classic Titans concept while improving balance, performance, and compatibility with newer game mechanics. Features: Large Titan boss creatures with unique abilities and attacks. New equipment, tools, and ores related to Titan progression. Improved boss animations and smoother […]

Evergrow
1.21.1neoforge

Evergrow

A brutal high-end adventure modpack packed with tons of new mobs, bosses, weapons and dimensions – heavily optimized and balanced for powerful PCs.

817downloads