This mod adds a new evil biome and world type, powerful monsters, and strong, magical armor. An evil is spreading across the land corrupting all in its path. Do you dare enter the Blighted land where the monsters you thought you knew have been mutated and twisted into even more dangerous abominations?

Zombie Skeleton:

Shoots twice as fast as a skeleton and has more health than a zombie. Not too difficult 1v1, but watch out for hordes and spawners. Drops same things as skeleton.

Corrupted Creeper:

Like creepers they explode. Just much bigger. They also leave behind a slime friend who will spread the mutating biome much quicker. Run twice as fast as a normal creeper. Drops gunpowder.

Diseased Spider:

Has slightly more health than a normal spider. Venom causes nausea.

Mutant Jockey:

Zombie skeleton riding a diseased spider. Where is your god now?


Enderman that spawns fire around it when it is attacked. It will then spawn a ring of fire around it every time it teleports.


Mutant Biome Mod

Mutant Biome Mod

Mutant Biome Mod

Mutant Biome Mod

Mutant Biome Mod

Mutant Biome Mod


Crosis armor is stronger than diamond and more enchantable than gold.

Cosis Tools:

Crafted the same way as all the other tools. Just replace the usual material with crosis ingots.
There is a crosis sword too.


  • Download and install Modloader
  • Delete META-INF file
  • Download Mutant Biome Mod
  • Drag and drop files from “Mutant Biome Mod” into “Minecraft.jar”
  • Close “Minecraft.jar” and run minecraft!



  • Mutant Biome only spreads in Normal and Hard difficulty
  • Fixed pyramid

For 1.5.2

For 1.5.1

Credits: xevozfighter