The Underworld

The Underworld.

The Underworld 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. Water that enters this layer evaporates immediately. 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 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 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.

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

The Underworld contains many hazards, most prominently a vast amount of Lava as well as frequently-spawning and uniquely challenging enemies. Hellstone inflicts damage on contact without the proper equipment, while mining it causes more Lava to form.

Contents

The Underworld
Enemies	Unique treasures	Unique drops
Hellbat Lava Slime Fire Imp Bone Serpent Demon Voodoo Demon Mimic (Only after hardmode) Wall of Flesh (boss)	Hellfire Arrow From Shadow Chests: Dark Lance Sunfury Flamelash Flower of Fire	From Fire Imps: Plumber's Hat (rare) From Demons: Demon Scythe (uncommon) From Voodoo Demons: Guide Voodoo Doll (always) From vegetation: Fireblossom From the terrain: Ash Block Demon Torch Hellstone Hellstone Brick Obsidian Brick Obsidian Brick Wall Hellforge Shadow Chest

Tips

• You can dig a tunnel two blocks wide down to the bottom of the world. 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.
• After Hardmode has been activated, the Underworld is mostly unchanged, and is therefore ironically one of the safest locations. This, in combination with offering easy access to many deep cave systems, keeps it a useful place to visit, especially when hunting for Adamantite Ore.

Bug: If you make water fall from a large enough pool (like Ocean), then do "Save and Exit" and load the world, there may be some stationary pools of water in Underworld. Using a Bucket on the pool, altering the water level by placing or removing blocks and entering water by character will make the water rapidly evaporate.

Bug: In the console edition if a non host player goes into a shadow building or stands near one for to long, they will crash.

Gallery

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  Water bug.

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  A glitch in a small map that causes three chests to spawn.

History

• 1.1: Demon Torches are added to ruined houses.
• 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.
• 1.0.5:
  • Water evaporates when reaching the Underworld layer.
  • Common Chests are now replaced with Gold Chests.
• Pre-Release: Introduced.