CurseForge · Minecraft mod
L2 Hostility
Enemy enhancement mod that gives mobs special traits
This page is having a moment, so a few details may be a little behind.
Quick answer
Which L2 Hostility release should I use?
L2 Hostility l2hostility-3.0.18.jar targets 1.21.1 with NeoForge. The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server. All 4 required mods have matching files.
Where it goes
Is L2 Hostility required on the client, server, or both?
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
The source does not explicitly classify this release as client-only or server-only.
What else does L2 Hostility l2hostility-3.0.18.jar need?
l2hostility-3.0.18.jar. Change the file and its required mods may change too.
Install L2 Library, Patchouli, Curios API, L2 Complements first. We found matching files for this game-version and loader setup. 6 come through another mod in the chain.
6 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add L2 Hostility without breaking your instance.
Built for L2 Hostility l2hostility-3.0.18.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use l2hostility-3.0.18.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install L2 Library, Patchouli, Curios API, L2 Complements first. We found matching files for this game-version and loader setup. 6 come through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether it belongs on the client. The project page does not say whether it belongs on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside l2hostility-3.0.18.jar. It opens that exact file at the source.
About this project
What does L2 Hostility add?
Discord: https://discord.gg/BCHNhsDMXz
Dependency:Curios API, Patchouli, L2 Library, L2 Complements (to utilize some enchantments and effects)
Suggest to play with: L2 Weaponry, L2 Archery
This mod adds a difficulty system that makes mobs stronger, and have special abilities.
This mod is similar to Champions, Scaling Health, and AtomicStryker's Infernal Mobs but differs in the following ways:
- Mob strength progress with player. Player would not encounter absurdly strong mobs at the beginning
- Mob strength are dependent on a lot of factors, instead of just being randomly strong.
- Reasonable progression: Increase difficulty only when you kill strong enemies. Decrease difficulty when you die.
- Traits, Difficulty, and Drops are highly customizable through config and datapack.
- There is a mechanic to make a region safe. You don't need to worry about strong mobs around your vase forever
It also adds 28 curio items to make you stronger and 2 enchantments to help fighting the mobs.
In-game Progression:
- Kill mobs with traits to collect ingredients
- Craft Curse of Envy to enable you to get trait symbols
- Get trait symbols and use them to craft better gears
Detailed Mechanics
There is a level associated with all enemies. Level is determined by the dimension, biome, position, nearby player difficulty, and entity type. As the level becomes higher, mobs have higher health and deal higher damage, and higher chance to have strong traits.
There is a difficulty level assigned to chunk sections and players. Killing mobs to gain chunk and player difficulty, and die to lose player difficulty. Use Hostility Detector to know about current difficulty, use Hostility Orb to make a chunk section permanently not spawning mobs with level.
Traits (37 total)
Regular Traits
- Fiery: Mobs can ignite you when attacked or attack you.
- Invisible: Mobs and their armors/weapons will become invisible. Use Detector Glass to see them.
- Protection: Mobs get damage resistance effect
- Regenerate: Mobs will regenerate health slowly.
- Speedy: Mobs will move at absurd speed
- Tank: Mobs will gain much more health and armor
- Shulker: Shoot shulker bullets every few seconds. It will not inflict levitation, but will inflict other potion effects the mob carries.
- Gravity: mobs and players around it will have higher gravity, falling faster and jumping lower
- Moonwalk: mobs and players around it will have lower gravity, falling slower and jumping higher
- Counter Strike: when the mob is attacked, after it lands on ground, it will attempt to dash-strike back, launching itself toward target.
Advanced Traits
These traits only appear after Lv.100
- Adaptive: Mobs will get memorize and get used to damage types. Higher level allows mobs to memorize more damage types
- Reflect: Mobs will reflect direct physical damage. Try to use arrow or magic.
- Grenade: Shoot explosive bullet every few seconds after the previous bullet disappears.
- Growth: Slime only. Slime will grow larger when healed to full health. Growth III slime can be very large.
- Split: Mobs will split into 2 with half level and same trait (with 1 level lower split trait) when killed. Subsequent mobs won't drop anything.
- Drain: Mobs will remove random positive potion effects, and increase duration of negative effects on target. Deals more damage if target has negative effects.
- Reprint: When hit target, copy target equipment enchantments. Increase damage based on target total enchantment points
- Corrosion: Appears only after Lv.200. When mob hit target, it will consume target equipment durability based on lost durability. Use Hardened enchantment to mitigate this effect.
- Erosion: Appears only after Lv.200. When mob hit target, it will consume target equipment durability based on remaining durability. Use Hardened enchantment to mitigate this effect.
Potion Traits
- Blinder - Blindness
- Distorter - Nausea
- Levitater - Levitation
- Stray - Slowness
- Weakener - Weakness
- Poisonous - Poison
- Withering - Wither
- Cursed (from L2Complements)
- Soul Burner (from L2Complements)
- Freezing (From L2Complements)
Legendary Traits
These traits will only be unlocked when you kills a mob with Rank 5 traits, and appear only after Lv.100
- Dementor: Mobs will be immune to physical attack, and their damage will bypass armor
- Dispelling: Mobs will be immune to magic attack, and their damage will bypass magical protections. They can also disable enchantments on your equipments for a short time
- Teleport: Mobs can teleport to avoid physical damage. Try to use magic.
- Repelling: Mobs will repel you. Use full set insulation enchantment to reduce the force.
- Pulling: Mobs will pull you toward it. Use full set insulation enchantment to reduce the force.
- Undying: Mobs will respawn indefinitely. Try to use Cursed potion or weapons that can inflict Cursed effect
- Killer Aura: Appears only after Lv.300. Mobs will deal damage to nearby targets every few seconds, range indicated by particle effects.
- Ragnarok: Appears only after Lv.600. When mob hit target, mob will "seal" some equipments or curios on target, which can be unsealed by hold using the item for a few seconds.
Default datapack configuration for other mods
Twilight Forest:
- Naga will have at least Lv.50
- All mini bosses will have at least Lv.100
- All other bosses will have at least Lv.150
- All bosses will have Cursed trait and 1 other fixed trait
- All boss spawners can be crafted with respective trophies, trait symbols of the traits they have as fixed traits, and chaos ingot.
Ice and Fire:
- All dragons are spawned with at least Lv.100 and 3 fixed traits including Regen and Adaptive. Don't attempt to fight them before you know how to deal with high level Regen and Adaptive. Though they will never gain Tanky trait as they are already tanky enough.
- Ghosts will carry Dementor trait at higher level, making them immune to all damage except magic damage.
- Siren will carry Drain and Distorter trait at higher level.
Cataclysm:
- All minibosses will have at least Lv.100 and 2 fixed trait
- All bosses will have at least Lv.200 and 3 fixed trait
- When bosses are higher than Lv.600, they carry special curios items making them extremely threatening.
- (starting from 2.4.24) Ignis and Ancient Remnant will spawn minions to help them. At Lv.400 or higher, they will also spawn relevants that protect them from damage.
Bosses of Mass Destruction:
- All bosses will have at least Lv.200 and 3 fixed trait
Mutant Monsters: (starting from 2.4.22)
- All mutant monsters will not spawn naturally unless they are at least Lv.100
- After Lv.150, all mutant monsters have 50% chance to gain Reprint
- After Lv.200, all mutant monsters have 50% chance to gain Adaptive
Gateways to Eternity (starting from 2.4.23, datapack based)
- Growth gateway: Spawns high level slime and magma cube with growth trait, dropping 2 growth trait symbols
- Split gateway: Spawns high level zombies, skeletons, and respective variants with split trait, dropping 2 split trait symbols
Mowzie's Mobs (starting from 2.4.24)
- Bosses will be at least Lv.100
First Page: Equipments and Creative Tools
Second Page: Trait Symbols (add trait to mobs, as crafting ingredient, and show trait details)



Checkout our other mods:
L2Backpack: Backpacks, mass item storage, and remote transportation
L2Artifacts: Curios items that gives high attribute boost and special abilities
ModularGolems: Tinker-like highly customizable golems that are handy in combat and mob farms
L2Weaponry: A variety of melee weapons, throwable weapons, and shields, each with special abilities
L2Archery: A variety of bows and arrows, each with special abilities
Curse of Pandora: A variety of charms that can be chained into necklace and bracelets to combine powers
Twilight's Flavors & Delight: Farmer's Delight style food with Twilight Forest ingredients. Also adds food in Neapolitan styles.
Cuisine Delight: Cook your own plate with any combination of ingredients you can think of
Fruits Delight: Adds 11 types of fruits and 48 food items. All fruits have unique food effects
Project description from CurseForge.
Pick your setup
L2 Hostility by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader build1.20.1
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
L2 Hostility versions and loaders
l2hostility-3.0.18.jar
26 Mar 2026
l2hostility-2.5.19.jar
26 Mar 2026
l2hostility-3.0.17.jar
12 Mar 2026
l2hostility-2.5.18.jar
12 Mar 2026
l2hostility-3.0.16.jar
27 Feb 2026
l2hostility-2.5.17.jar
27 Feb 2026
l2hostility-3.0.15.jar
17 Feb 2026
l2hostility-2.5.16.jar
17 Feb 2026
l2hostility-2.5.15.jar
15 Feb 2026
l2hostility-3.0.14.jar
30 Jan 2026
l2hostility-2.5.14.jar
30 Jan 2026
l2hostility-2.5.13.jar
25 Jan 2026
Looking for an older file? The official CurseForge project page is in Resources.