bosses creeechurs etc

Cataclysm is a mod that adds difficult dungeons, challenging boss-fights and powerful items.

Mowzie's Mobs adds a variety of fictional creatures to Minecraft, priding itself in unique AI, rich atmosphere, and fluid animations. Prove your might against new bosses and enemies and claim their magical abilities as your own.

An expansion for caves, including new biomes, mobs, and more.

Adds outvoted and forgotten mobs from the mob vote, expanding on their original concepts and adding new vanilla-like features. The mod includes: Copper Golem, Crab, Glare, Moobloom, Iceologer, Rascal, Tuff Golem, Wildfire, Illusioner, Zombie Horse

Allows you to pat ANY loved and unloved living mobs in Minecraft!

The hostile paradise of yore, bask upon a new dawn

Terramity is a Terraria-inspired mod that adds many new bosses and weapons to diversify your Minecraft experience

The community version of mod Ice and Fire

Explore the vast, challenging dungeons that are loaded into your world! This mod introduces new dungeons, along with tricky, but fair bosses to fight at the end of the dungeon.

Adds monster hordes invasions and zombie infection.

Adds new fantasy creatures in vanilla style

Adds little ghosts to Minecraft :D

Adds new attacks and abilities to a variety of mobs.

Adds roaming pillager caravans with biome-themed loot and guarded convoys

All things Butterflies (and Moths!)

A server-side mod that makes boss health and loot drops scales to player count.

Re-imagining the world of Minecraft by filling it with diverse, tameable dragons that roam the new and beautiful worlds awaiting to be explored by those who dare to venture into such territories, where magic advances beyond enchanting. This, Is Wyrmroost.

No zombie is alone — prepare for group hunts, AI ambushes, and break-ins through glass and fences. Survive smarter, stronger hordes that evolve with you.

add Enchanter and Mob enchant From Minecraft Dungeons

Deadly Deadly Dungeon add new sprawling randomly generated dungeons with multiple levels of difficulty, loot and bosses. The datapack is ideal if you want an adventure or a real challenge. Can you beat the dungeon?

A mod that adds robot animals to Create

A mod contains many monsters and bosses in Terraria

Mob champions are special elite versions of regular mobs that spawn with armor, weapons, enhanced stats and effects. Legendary loot!

Face the deadliest bosses ever forged combat, fights, and chaos await!

An overhaul of Minecraft's way of progressing though the game : bosses, RPG-like, new mechanics, multiplayer compatibility, weapons, ores... !

Any hostile mob can randomly spawn as a SUPER BOSS

Dangerous is a balancing mod designed to enhance the challenge of Minecraft, especially when combined with other mods that grant players powerful abilities or additional health.

New challenging daylight creatures

Global modification for Java Minecraft centered around playable dragons.

A mod that improves Minecraft's spiders!

A vanilla+ datapack that adds four brand-new raids with powerful enemies to conquer and rewarding loot to win!

This fan mod adds over 40 creatures to your Minecraft world! Each creature has a unique design and behavior inspired by the game Creatures of Sonaria. Tame them, farm them, battle them...whatever you want! That is up to you!

A mob-focused mod that adds new creatures each with distinct behaviors, abilities, and interactions. All designed to fit seamlessly into vanilla gameplay.

Updates Creepers, causing them to summon Creepies when exploding, but removing their ability to break blocks!

Expands the role of Minecraft's Spiders and Silverfish, as well as adding new mobs, armors, enchantments, and items.

This datapack improves arthropods, makes them more interesting and adds new types of spiders!

This mod adds a rare neutral flying whale. Kill it to harvest its corpse, which gives lift giving blocks for Create: Aeronautics.

This mod adds a few friendly mobs to the game that make the world feel more alive and immersive. Includes 3 unique mobs!

Adjusts the stats of bosses and mobs, multiplied by the number of players on the server.

Scale mobs in a vanilla way. Extremely configurable and data driven to expand easily.

An officially-approved successor to Primitive Mobs!

A Minecraft mod that makes mobs more intelligent and reactive to players, light, and sound.

Removes the Elder Guardian curse effect when receiving mining fatigue

Adds immersive, fully customizable encounters. More challenge, more surprises.

Smarter vanilla hostile mobs with tactical AI.