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The Underworld

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BiomeBannerUnderworld.png

The Underworld (also known as Hell) is the deepest layer of the World. It is largely an open cavity that stretches across the World's bottom, with a ceiling of Ash Blocks and a lower terrain of large Lava pools, Ash Blocks, and Hellstone ore. The Underworld is considered the most challenging biome prior to Hardmode, and is marked by a unique animated background that shows veins of flowing lava.

The Underworld contains many hazards, most prominently a vast amount of Lava as well as frequently-spawning and uniquely challenging enemies. Hellstone, of which much of the solid surface consists, inflicts damage on contact without the proper equipment, while mining it causes more Lava to form. Water that enters this layer evaporates slowly. An additional hazard is the Wall of Flesh, which may be accidentally summoned by killing a Voodoo Demon over lava.

Due to the fact that The Underworld provides access to large amounts of Hellstone, the main ingredient of Hellstone Bars, which are required to craft high-tier pre-Hardmode items, it is recommended to use this to craft said items. It is also where the Wall of Flesh, the final pre-Hardmode boss, may be summoned. Shadow Chests found here can contain unique Underworld-only items. The Demon Scythe, a rare and coveted magic weapon, may be dropped by Demons. Upon defeating one of the hardmode bosses, Lava Bats and Red Devils start spawning in the underworld.

The middle two quarters of the Underworld contains several Ruined Houses, which are Obsidian and Hellstone Brick towers that contain Shadow Chests, Hellforges, Pots, and Obsidian Furniture. The Shadow Key is required to open all chests found here.

In hardmode, the area above the Underworld is a great place to search for ores as it is very deep underground.

Contents[edit]

The Underworld
Characters Unique Treasures Unique Drops
Hellbat.png Hellbat
Lava Slime.png Lava Slime
Fire Imp.png Fire Imp
Arch Demon.png Arch Demon
Console only.png Mobile only.png
Demon.png Demon
Voodoo Demon.png Voodoo Demon
Bone Serpent.png Bone
Serpent
Wall of Flesh.png Wall of Flesh
(boss)

During Hardmode:

Mimic.png Mimic

After defeating a
Mechanical Boss:

Lava Bat.png Lava bat
Red Devil.png Red Devil
Hellfire Arrow.png Hellfire Arrow

From Shadow Chests:

Dark Lance.png Dark Lance
Sunfury.png Sunfury
Flamelash.png Flamelash
Flower of Fire.png Flower of Fire
Drax.png Drax
Mobile only.png (very rare)

From Fire Imps:

Plumber's Hat.png Plumber's Hat
(rare)
Obsidian Rose.png Obsidian Rose
(rare)

From Demons:

Demon Scythe.png Demon Scythe
(uncommon)

From Lava Bats,
Red Devils, and Hellbat:

Magma Stone.png Magma Stone
(uncommon)

From Red Devils:

Fire Feather.png Fire Feather
(rare)
Unholy Trident.png Unholy Trident
(rare)

From Voodoo Demons:

Guide Voodoo Doll.png Guide Voodoo Doll
(100% chance)

From Arch Demons: Console only.png Mobile only.png

Crystal Shard.png Crystal Shard
(2-5) Mobile only.png
Crystal Storm.png Crystal Storm
(very rare) Mobile only.png

From any enemy
in Hardmode:

Living Fire Block.png Living Fire Block
Pc only.png (2% chance)

From vegetation:

Fireblossom.png Fireblossom
Fireblossom Seeds.png Fireblossom
Seeds

From terrain:

Ash Block.png Ash Block
Demon Torch.png Demon Torch
Hellstone.png Hellstone
Hellstone Brick.png Hellstone Brick
Obsidian Brick.png Obsidian Brick
Obsidian Brick Wall.png Obsidian Brick
Wall
Hellforge.png Hellforge
Shadow Chest.png Shadow Chest
Obsidian Door.png Obsidian Door
Obsidian Bed.png Obsidian Bed
Obsidian Table.png Obsidian Table
Obsidian Chair.png Obsidian Chair
Obsidian Work Bench.png Obsidian
Work Bench

Tips[edit]

  • After hardmode, the Underworld will be, ironically, the safest place after everything is either Corrupt, Jungle, Hallowed or Crimson. However, once a Mechanical boss is defeated, Red Devils and Lava Bats will spawn. (Note: this can happen before hardmode, if a boss is summoned and defeated before the Wall of Flesh.)
  • You can dig a tunnel two blocks wide down to the bottom of the world. With a Lucky Horseshoe, Wings, or by jumping with a Cloud in a Bottle at the end, you can fall down this tunnel, sometimes called a "hellevator". Since you're in a two-block-wide space, monster spawn rates are heavily reduced, especially for the annoying Fire Imps. This gives you the chance to mine as much Hellstone as you want, but use caution when expanding this tunnel; a larger cave has higher chances of Fire Imp spawns.
  • You can bring 50 pieces of Meteorite to the Underworld and thus create an artificial Meteor Biome.
  • In a large world the underworld is about 3000 feet deep; in a medium world it starts around 2000 feet deep.
  • If you stick around the roof in the top part of the Underworld, you may find parts of an Underground Jungle.

Gallery[edit]

History[edit]

Game mechanics
 
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