Minecraft Java 1.21 Mods
Browse 194 free mods for Minecraft Java 1.21 — popular picks include randomitems-mod, Explorer's Journal, Arka Announce.
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randomitems-mod
Adds /randomitems, /randommobs, /randomweapon, /randomarmor, /randomtool and /randomquest commands that periodically give random items, spawn random mobs, swap your gear, or assign 5-minute random quests with a boss bar and personal sidebar.
Explorer's Journal
A chat-driven exploration journal. Discover biomes and structures, get notifications, details, toggle a bossbar, view your full journal with /trigger
Arka Announce
A powerful Minecraft plugin for sending customizable screen announcements with Titles, ActionBars, Chat messages, and a dynamic BossBar countdown system.
Chain Accessories
Wear chains like a boss
Boss Radar
Craft a special compass that senses powerful mobs lurking nearby. Hold it to see a color-coded ring around your crosshair with the boss's name and distance, turning red as danger closes in — perfect for staying alert to the Ender Dragon, Wither, Warden
Mars mod!!!
this mod adds mars along with bosses and lore. this is my first mod that I will put on modrinth.
Chariz's Mayhem
A Minecraft Mod That Aims To Add Fun Things Into Minecraft, Such As New Mobs, Bosses, Weapons, Tools, Armor etc. Created By The Maniac Himself, DarkChariz
NxControl
NxControl is an advanced staff plugin that lets OP players control players or mobs using simple keybinds, with GUI, bossbars, and freeze system built-in. It’s lightweight, powerful, and perfect for moderation, trolling, or cinematic gameplay.
Ways Of The Wither
Bonus content for the Wither Boss lore and wither stars.
Timber´s Call
Timber’s Call adds Grimbark, an automatic woodcutting NPC, unique workstations for progression, mystical crafting, and a boss fight — all without a resource pack. Answer the call!
SuperGem
Add a new ore, new capacities, new miniboss
Bossbar Day-counter
Adds a day counter and displays it in the boss bar.
Endless Instability
This mod changes many stages of Minecraft, adding new blocks, tools, and bosses. It's not yet finished and is in early development. It's 70% translated into English and 100% into Russian.
Item Challenge
Give your server a collective goal: collect a set amount of any item before the in-game days run out. Track progress in real time through a boss bar, deposit your items in one command, and see who contributed the most.
MashStrikeDrops
The plugin is aimed at event servers, crates-style mob encounters, grind zones, boss-lite content, and custom reward systems without needing MythicMobs or a larger RPG stack.
Attrition
A world that answers your progress. 600+ mechanics: bleeding, thirst, curses, diseases, rebuilt bosses and a world that learns from every mob you kill.
Amboss Haltbarkeit / Anvil Durability
Always see the remaining durability of your anvil.
Dragonfight Updated
This datapack is an improvement of the dragon fight. With a new mini-boss and even more.
AzurealDamaGE
This plugin displays a player's damage and health information in the boss bar when you hit them on PvP servers. It only has one version and is compatible with Paper version 1.21, but you should download and try it anyway.
![️ Arachnid Queen Boss - Epic 4-Phase Spider Battle [AI-Customizable]](https://pub-2ae937f770284535a96c3330f91236aa.r2.dev/thumb/spiget/166612.webp)
️ Arachnid Queen Boss - Epic 4-Phase Spider Battle [AI-Customizable]
Metamorphosis mechanic, explosive minions, web traps & berserker mode!
Flame Announcer
A powerful and highly customizable announcement plugin featuring scheduled Chat, BossBar, and Interactive clickable messages with full in-game management.
Kione
Boss-style ability kit for a private SMP: homing skulls, a reflection shield, speed burst, auto-revive, summons and a server-side siege system. Abilities are bound to one account.
Calamity Bosses
20 NEW bosses that will shift the power changes in your world, adding custom item rewards and custom blessings to ease your fare through this treacherous world.
RX-KeyAll
A lightweight, highly optimized KeyAll plugin with dynamic BossBar countdowns and RGB support.
Boss Cannon
The Boss Cannon Inspired By WMC
Endmode 2 | Terraria Style Datapack
Terraria inspired overhaul to progression. New bosses, items, etc.
bettercombat
Combat tag plugin, appears in bossbar, cuztomizable text and line color.
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 […]
Reliquified L_Ender's Cataclysm Mod (1.21.1, 1.21) – Relic-Based Progression Addon
Reliquified L_Ender's Cataclysm Mod introducing new relics themed around Cataclysm bosses and mechanics. These relics are designed to be obtained through advanced gameplay and are intended to complement existing relic systems rather than replace them. Features: Acts as an addon bridging Relics and L_Ender’s Cataclysm Adds new relics themed around Cataclysm bosses Relic effects are […]
Endercon Data Pack (1.21.11, 1.20.1) – A New Frontier
Endercon Data Pack offers a fresh take on the End, introducing intricate level design, innovative traversal mechanics, and a diverse range of biomes. Explore a reimagined End dimension, filled with stunning landscapes, challenging puzzles, and epic boss battles. Enjoy playing this data pack! Features: The terrain has been shaped with traversal at its goal, expecting […]
Bosses'Rise Mod (1.21.1, 1.20.1) – Dungeons, Dragons, And Dodge Rolls
Bosses'Rise Mod adds epic new world bosses to Minecraft, each with unique mechanics, deadly attacks, and exclusive drops. From fire-breathing dragons to ambushing sandworms, this mod brings intense mid-to-endgame content for players craving more challenge and adventure. Features: 5 custom world bosses with unique dungeons and skills. Combat roll ability (press Z), improved with Knight […]
Qliphoth Awakening Mod (1.21.1, 1.20.1) – Find New Bosses to Conquer
Qliphoth Awakening Mod adds a series of challenging bosses to your world. Each boss has its own unique attacks, mechanics, and special drops. You can find these bosses inside special arenas that generate naturally. Before starting a fight, you can use a spawner structure to read about the boss's abilities. After you win, the spawner […]
Combat Effects Mod (1.21.1, 1.20.1) – Trigger Effects When Entities Enter Combat
Combat Effects Mod provides an effects system when entities participate in combat, helping to enhance the combat experience. Supports the use of regex to customize the effect activation conditions. Various effects can be applied to each situation, from boss fights to PvP, creating flexible combat mechanisms. Features: Trigger effects when entities enter combat. Regex support […]
Better Ender Dragon Resource Pack (1.21.1, 1.20.1) – Texture Pack
Better Ender Dragon Resource Pack upgrades the appearance of the Ender Dragon without changing its mechanics. The redesigned textures give the iconic boss a more menacing and detailed look, making the final battle feel more intense and immersive. Screenshots: Better Ender Dragon Resource Pack Download Links For Minecraft 1.21.x 16x: Download from Server 1 – […]
Bosses of Mass Destruction Mod (1.21.1, 1.20.1) – Boss battles Can Be Much More Exciting
Bosses of Mass Destruction Mod is a mod focused on expanding the number of available bosses in Minecraft. Although it currently only adds four new bosses, the emphasis is on their mechanics, aesthetics, and overall design rather than quantity. Features: 4 bosses included in this mod are: Night Lich – Found in mysterious towers that […]
BetterScoreboard
A packet based custom scoreboard and boss bar plugin.