The Creeping Nether

Once a Nether portal is built, corruption begins to spread slowly over the surrounding land, leaving a scorched landscape behind. Stone and dirt become Netherrack, sand becomes Soul Sand that can grow Nether Wart, cobblestone turns into a new block called Blood Stone, and trees burn into charred wood that drops charcoal. Mobs can spawn from the Nether side, and the corruption occasionally strikes with lightning that transforms the creatures it touches. Villagers become witches, pigs become zombie pigmen and slimes become magma cubes, while cows and sheep react badly to the unstable energy.

Corruption can be limited in how far it reaches, and breaking the portal halts its spread. Nether essence is mined from Nether ores in the overworld and works on corrupted blocks much like a portal does. Once washed with a Ghast tear it becomes purified and can cleanse Nether blocks and Hallow blocks. Catalysts are crafted from dragon breath and a charged soulstone or hallowstone, and the effects grow over time as the surrounding blocks are charged. The default configuration includes support for Biomes O' Plenty, and more options control which blocks the corruption turns into.

Every player and the server need a copy of the mod. It is published for Forge only, for Minecraft 1.12.2, and is released under the Creative Commons Attribution Non Commercial 4.0 license, which means it is not open source. The source code is public. Files were first published and last updated on 2024-09-23, and the latest file is 2.2.2 for 1.12.2.