Terraria Wiki

  • Discussions are now available on the Terraria Wiki.
  • Miss the old Hydra Skin? Try out our Hydralize gadget! Visit the preferences page while logged in and turn on the gadget.

READ MORE

Terraria Wiki
Advertisement

The Underworld (also known as Hell) is the deepest layer of the world, marked by a unique animated background depicting a large, open space with magma pools and pillars. It is a large, 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. It also contains several Ruined Houses, which are natural structures containing unique furniture and other loot. The Underworld is considered the most challenging biome prior to Hardmode.

The Underworld contains many hazards, most prominently its broad expanses of Lava. It also contains several unique and difficult enemies. Hellstone, of which much of the solid surface consists, is a valuable crafting material that can only be obtained in the Underworld; however it inflicts damage to players on contact without the proper equipment, while mining it also causes more Lava to form. Any Water that enters the Underworld evaporates.

The Wall of Flesh boss can be summoned here. Defeating it will cause the world to convert to Hardmode. It is possible to summon the Wall of Flesh accidentally, by inadvertently killing a Voodoo Demon positioned over lava. This is likely to surprise and kill most unprepared players.

The middle two quarters of the Underworld contain several Ruined Houses, which are Obsidian and the less common Hellstone Brick towers that contain Shadow Chests, Hellforges, Pots, Obsidian Furniture, and other lootable items. Shadow Chests require the Shadow Key to open (acquired in the Dungeon's locked Gold Chests, the Golden Lock Box from Dungeon Crates, or dropped from Template:Mobile iconArch Wyverns), and can contain unique Underworld-only loot.

Contents

The Underworld
Characters Unique Treasures Unique Drops
HellbatHellbat
Lava SlimeLava Slime
Fire ImpFire Imp
Template:Il2l
DemonDemon
Voodoo DemonVoodoo Demon
Template:Il2l
Template:Il2l

During Hardmode:

MimicMimic
Tortured SoulTortured Soul Template:Pc icon

After defeating a
Mechanical Boss:

Lava BatLava Bat
Red DevilRed Devil
Hellfire ArrowHellfire Arrow

From Shadow Chests:

Dark LanceDark Lance
SunfurySunfury
FlamelashFlamelash
Flower of FireFlower of Fire
Template:Il2l
Template:Il2l

From Fire Imps:

Template:Il2l
Template:Il2l

From Demons:

Template:Il2l

From Lava Bats,
Red Devils, and Hellbat:

Template:Il2l

From Red Devils:

Template:Il2l
Template:Il2l

From Voodoo Demons:

Template:Il2l

From Arch Demons: Template:Console icon Template:Mobile icon

Template:Il2l
Template:Il2l

From any enemy after
defeating Skeletron:

Template:Il2l

From any enemy
in Hardmode:

Template:Il2l
Template:Il2l

From vegetation:

FireblossomFireblossom
Template:Il2l

From terrain:

Ash BlockAsh Block
Demon TorchDemon Torch
HellstoneHellstone
Hellstone BrickHellstone Brick
Obsidian BrickObsidian Brick
Template:Il2l
HellforgeHellforge
Shadow ChestShadow Chest
Obsidian DoorObsidian Door
Obsidian BedObsidian Bed
Obsidian TableObsidian Table
Obsidian ChairObsidian Chair
Template:Il2l

Tips

  • 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, which drastically increases the danger of the Underworld. (Note: this can happen before hardmode, if a Mechanical 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, commonly called a "hellevator" (even in other games.) Since you're in a two-block-wide space, monster spawn rates are heavily reduced, especially 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. However, this is no longer useful in any way during hardmode as meteor heads stop dropping loot once the Wall of Flesh has been defeated.
  • In a large world the underworld starts at 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.
  • Despite the more sequential boss difficulty, the Underworld is actually far easier to survive in than the Dungeon or Underground Jungle. A player should by all means explore the underworld as soon as they have a pickaxe that can mine hellstone, or even before if they would like to make use of Hellfire Arrows or the Demon Scythe spell, so long as they have sufficient means of avoiding the lava.

Achievements

Achievement It's Getting Hot in Here
It's Getting Hot in Here • “”
Reach The Underworld for the first time. Template:Pc icon
Achievement Rock Bottom (PC)
Rock Bottom • “”
Reach the very bottom of The Underworld. Template:Pc icon
Achievement Rock Bottom
Rock Bottom • “”
Reach the very bottom of The Underworld. Template:Console icon Template:Mobile icon

Notes

  • Just above the Underworld (if Backgrounds are on) will be the old background the Underworld used to have. It can be recognized as a warning that the player has gotten close to the Underworld.
  • After defeating the Wall of Flesh and releasing light and dark spirits into the world, the game will draw in diagonal sections of Hallow and Corruption/Crimson. Within these diagonals water can exist in the Underworld because the biome within the diagonals are rewritten as Hallow or Corruption/Crimson. The water will not evaporate unless segments of the pool are outside of the diagonal.

Gallery

History

  • 1.3.0.1: New background and soundtrack.The old soundtrack now used during the blood moon instead.
  • 1.2.3: Fixed the bug where removing walls in the Underworld would not update the map.
  • 1.0.6:
    • Ruined houses now spawn differently. They often spawn as all Obsidian Brick, and they can now get really tall.
    • Clumps of Ash are now filled with more lava pockets, making mining Hellstone more of a challenge.
    • Gold Chests are now replaced with Shadow Chests which now hold most underworld loot.

Template:Translation project

Advertisement