Underground Worlds FAQ

Underground biomes generate naturally beneath their surface counterparts—dig down in a jungle to find the Underground Jungle, under cold biomes for Spider Caves or Underground Tundra, and under deserts for the Underground Desert. They typically begin spawning around Y-level 0 and below, but you may need to explore vertically to locate them.

Bring a pickaxe, sword, and food before descending. Watch for Jungle Zombies and Jungle Bees that can poison you—craft or find an Antidote Flask to counter poison damage. Locate a Jungle Temple to obtain unbreakable temple tools, which can be upgraded into powerful weapons like the Blade of the Jungle.

Hunt Black Recluse spiders in Spider Caves to collect Spider Fangs, then craft these fangs into Spider Armor pieces. A full set grants you a chance to poison attackers when you're hit, making it excellent for melee combat in underground areas.

Yes—craft Freezing Tools using frozen cores found in Ice Dungeons within the Underground Tundra. When you hit mobs with these tools, they become frozen and immobilized temporarily, giving you time to escape or deal additional damage.

Frozen Zombies, Icy Creepers, and Strays in the Underground Tundra can freeze you on contact or through explosions. Avoid prolonged exposure to these mobs, and consider wearing armor or using healing items to recover quickly if frozen.

The Underground Desert is filled with fossils and valuable ore deposits, including diamond ore embedded in the sand and rock. Mine carefully to avoid quicksand traps while collecting these resources.

Temple tools can be upgraded into special weapons: the Blade of the Jungle inflicts poison on enemies, and the Axe of Regrowth plants saplings when you hit blocks or mobs. These upgrades make exploration and combat more dynamic.

Yes—each underground biome has unique loot pools. The Underground Jungle offers temple tools and Antidote Flasks, Spider Caves drop Spider Fangs, the Underground Tundra contains frozen cores, and the Underground Desert has fossils and ore. Explore each biome to find specialized equipment.

Underground mobs like Jungle Zombies, Black Recluse, and Frozen Zombies can travel with you if you lead them upward, but they may despawn or behave differently in non-matching biomes. It's generally safer to farm resources underground where these mobs naturally spawn.

Most underground blocks can be mined with standard pickaxes, but temple tools and upgraded weapons are unbreakable and more efficient. Frozen cores and spider fangs require normal mining but are best collected with appropriate tools to maximize durability.

It adds underground biomes and underground dungeons, plus some above ground structures, in a modular and configurable way. Each biome has its own terrain, mobs, structures, and loot.

The Modrinth project page lists Minecraft versions 1.21.8, 1.21.10, 26.1, 26.1.1, 26.1.2, and 26.2.

It supports Fabric, Forge, and NeoForge.

Yes. The mod file registers 94 items and blocks , including things like abyssal prismarine , ice bricks , pyramid bricks , glowshroom , quicksand , and the freezing tools.

It adds 9 mobs: Abyssal Guardian, Black Recluse, Frozen Zombie, Glow Bogged, Icy Creeper, Jungle Bee, Jungle Zombie, Spider Hatchling, and Wrapped.

It adds underground biomes including the Underground Jungle, Spider Caves, Underground Tundra, and Underground Desert. All biomes can be enabled or disabled in the config.

It generates under jungles or other warm biomes and is filled with jungle grass , mud, and hostile jungle-themed mobs. It contains Jungle Temples with traps, chests, and unbreakable temple tools.

Jungle Temples contain unbreakable temple tools that can be upgraded into special weapons like the Blade of the Jungle , which inflicts poison, and the Axe of Regrowth , which plants saplings.

The Desert Charm is found in the Pyramid and grants immunity to blindness.

When used alongside other world generation mods, it may be necessary to use TerraBlender or Lithostitched for the biomes to generate in the world.