The Dreadlands is a dark dimension, ruled by The Dreadlord who took control, building the Dread Castle and the Haven Igloo to secure the Ancient Jewel and Ancient Gemstone. There are a total of 3 biomes in the Dreadlands. These biomes are called: The Dreadlands, Withered Plains, and Crimson Dreadlands. 4 different mobs spawn in the Dreadlands biome, the Dark Archer, Husk, Vampire, and Geophantom. The Dread Castle will only spawn in the Dreadlands biome, which is necessary to obtain the Ancient Jewel. In the Withered Plains, skeletons will spawn. The Crimson Dreadlands filled with massive bioluminescent mushrooms and spawns strictly piglin brutes which makes this biome the most dangerous of the 3.