Preamble

Have you ever wanted your actions to affect your world in a big way? Have you ever wanted to truly feel like the hero in Minecraft? Now you (and your friends) can! Introducing - "WitherD"

This very simple and highly configurable mod will cause your world to change in 2 key ways when you slay the Wither! First is fewer natural undead spawns. Vanilla or modded, if a mob takes extra damage from Smite, it will spawn less frequently, until you reach a configurable threshold, at which point it will no longer spawn!

Monster Spawners and other unnatural forms of spawning will still function but it will be up to players/pack authors to figure out how you're going to get phantom membranes and modded undead drops after that happens.

Secondly, Piglins and Hoglins will be able to survive outside the Nether without zombifying upon slaying the Wither a configurable number of times. You can now exploitlessly create bartering halls in your overworld base!

Config

WitherD was built from the ground up to be as configurable as possible; you may select between Flat Reductions or Percentage Reductions for undead culling; Flat Reductions will cause rarer undead to vanish faster, becoming extinct in order of rarity. Percentage Reductions makes rarer undead even rarer but won't become extinct until all undead do, simultaneously. Included as well is a blacklist, allowing you to give certain undead mobs a pass from the WitherD system entirely.

The No Zombification feature is also fully customizable, allowing it to become active at the start of the game, after a single Wither kill, after a set number of kills, or never.

This mod was made by the incredibly skilled GabrielT