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

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 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.

A mod that adds robot animals to Create

add Enchanter and Mob enchant From Minecraft Dungeons

A mod contains many monsters and bosses in Terraria

New challenging daylight creatures

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

A mod that improves Minecraft's spiders!

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

Any hostile mob can randomly spawn as a SUPER BOSS

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

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.

Global modification for Java Minecraft centered around playable dragons.

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

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.

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

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

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

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

An officially-approved successor to Primitive Mobs!

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

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

Smarter vanilla hostile mobs with tactical AI.

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