
Modrinth · Minecraft mod
Gene Mutation
This is a mod that dynamically increases difficulty. All mobs will gradually undergo mutations.
Quick answer
Which Gene Mutation release should I use?
Gene Mutation 1.0.0-26.2 targets 26.2 with Fabric. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is Gene Mutation required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does Gene Mutation 1.0.0-26.2 need?
1.0.0-26.2. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Gene Mutation without breaking your instance.
Built for Gene Mutation 1.0.0-26.2. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 1.0.0-26.2. It targets 26.2 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 1.0.0-26.2. It opens that exact file at the source.
About this project
What does Gene Mutation add?
Description
This is a dynamically increasing difficulty mod, where the genes of all mobs undergo mutations every night. These mutations will gradually accumulate and eventually become very frightening.
Everything can be adjusted in the configuration, and you can find your own difficulty curve.
Mutation Probability is the probability of mutation every night. If it is greater than 1, multiple mutations may occur every night.
Mutation Rate is the multiplier of the degree of mutation. The larger it is, the higher the degree of mutation each time.
Killing a mob has a probability of dropping genes, with a default probability of 1%.
By continuously observing genes with a telescope, it can be transformed into the studied gene. You can use it to know which mutations are currently occurring.

Faced with the increasing mobs, you are not without countermeasures. You can use degenerated gene fragments to reduce the degree of mutation in certain genes. For this you need degenerating table.

Genes
Here is an introduction to all genes.
| Name | ID | Max | Description |
|---|---|---|---|
| Health Boost | health | 200 | Increases mob health |
| Strength Boost | strength | 50 | Increases mob attack damage |
| Speed Boost | speed | 30 | Increases mob movement speed |
| Mini Size | mini | 50 | Shrinks mob size |
| Poison Touch | poison | 100 | Poison the target of the attack |
| Wither Touch | wither | 100 | Wither the target of the attack |
| Flame Touch | flame | 60 | Ignites the target of the attack |
| Ender Touch | ender_touch | 30 | Exchange positions with the target of attack |
| Ender Body | ender_body | 30 | Teleport when hit |
| Potion Constitution | potion | 15 | Grant potion effects |
| Armor Constitution | armor | 100 | Grant armor and enchantments |
| Weapon Constitution | weapon | 100 | Grant weapon and enchantments |
| Blade Defense | sword_def | 100 | Reduces sword damage |
| Tool Defense | tool_def | 100 | Reduces tool damage |
| Spear Defense | spear_def | 100 | Reduces spear damage |
| Hammer Defense | hammer_def | 100 | Reduces hammer damage |
| Trident Defense | trident_def | 100 | Reduces trident damage |
| Fire Resistance | fire_res | 100 | Reduces fire damage |
| Magic Resistance | magic_res | 100 | Reduces magic damage |
| Fall Resistance | fall_res | 100 | Reduces fall damage |
| Arrow Deflection | arrow_def | 100 | Refelect projectiles |
| Explosion Resistance | explosion_res | 100 | Reduces explosion damage |
| Knockback Resistance | knockback_res | 100 | Reduces knockback |
Commands
You can open config interface using command "/gene config".
"/gene mutation [id]" can undergo a genetic mutation immediately.
"/gene set " can set the mutation degree.
"/gene reset" will reset all mutation degree to 0.
"/gene show" can print all mutated genes.
Project description from Modrinth.
Pick your setup
Gene Mutation by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Gene Mutation versions and loaders
1.0.0-26.2
gene-mutation-1.0.0-26.2.jar
28 Jul 2026
1.0.0-26.1.2
gene-mutation-1.0.0-26.1.2.jar
28 Jul 2026
Looking for an older file? The official Modrinth project page is in Resources.