Defiled Lands Mod 1.12.2 has released a lot of defiled biomes that can spawn in the world. They will appear together with their mobs, plants, and even treasures.

Defiled Lands’ Existing Features
These are strange biomes that contain a rich variety of dangerous trees and creatures. Don’t forget to loot! The following information will help you find more secrets.
Biomes will actively change the blocks inside them in form.
Additionally, they can introduce a series of special resources. They are helpful to make unique and strong tools. These weapons are useful to destroy the boss and collect better gear.
Others
Lands can spread more than 3 blocks from the initial boundaries unless you reset the config. That’s also the way to stop them from spreading.
It’s entirely possible to apply blocks for decoration as long as you are out of the natural defiled biome.
It’s compatible with other biomes mods.
Defiled Lands is a mod that involves various categories like ores and resources, adventure and RPG, so on. It requires Minecraft Forge.
Screenshots