Underground Crimson

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BiomeBannerUnderground Crimson.png

The Underground Crimson is a Hardmode biome, being one of the biomes that spawns when the Wall of Flesh is defeated. It is the underground version of the surface-level Crimson, and appears at and below the cavern layer. It operates similarly to surface Hardmode Crimson, being comprised of Crimstone and Crimsand, though it spawns different enemies. Underground Crimson spreads just like surface Crimson, and similarly can not spread to The Hallow (nor to Underground Hallow). Additionally, small pockets of Underground Crimson can be created through the breaking of Crimson Altars, which can convert a single random stone block in the world into Crimstone upon their destruction.

Underground Crimson does not suppress the spawn of other underground and cavern enemies.

A player is considered to be in an Underground Crimson biome when there are at least 200 crimstone/crimsand blocks near the player.

All enemies killed in the Underground Crimson have a 1/5 (20%) chance to drop a Soul of Night. In Expert Mode this increases to a 1/3 (33%) chance.

Note: Most characteristics of surface Crimson apply to the Underground Crimson, with the exception of the enemies that spawn. See Crimson for more extensive information.

Contents[edit | edit source]

Underground Crimson
Characters Unique Drops
Blood Jelly.png Blood Jelly
Blood Feeder.png Blood Feeder
Crimson Axe.png Crimson Axe
Ichor Sticker.png Ichor Sticker
Floaty Gross.png Floaty Gross
Crimson Mimic.png Crimson Mimic Desktop only.png Desktop only.png
From Crimson Axes:
Nazar.png Nazar

From Ichor Stickers:

Ichor.png Ichor

From Floaty Grosses:

Vertebrae.png Vertebrae
Vitamins.png Vitamins
Meat Grinder.png Meat Grinder
From Crimson Mimics: Desktop only.png
Life Drain.png Life Drain Desktop only.png
Dart Pistol.png Dart Pistol Desktop only.png
Fetid Baghnakhs.png Fetid Baghnakhs Desktop only.png
Flesh Knuckles.png Flesh Knuckles Desktop only.png
Tendon Hook.png Tendon Hook Desktop only.png
Greater Healing Potion.png Greater Healing Potion
Greater Mana Potion.png Greater Mana Potion
From any enemy:
Crimson Key.png Crimson Key (1/2500 chance) Desktop only.png
Crimson Key Mold.png Crimson Key Mold Console only.pngMobile only.png3DS logo.svg (1/2500 chance) Console only.png Mobile only.png
Soul of Night.png Soul of Night (1/5 chance)

From vegetation:

Deathweed.png Deathweed

From terrain:

Crimstone Block.png Crimstone Block
Crimsand Block.png Crimsand Block

From Fishing:

Crimson Tigerfish.png Crimson Tigerfish
Hemopiranha.png Hemopiranha

History[edit | edit source]

  • 1.2.4: Now has its own specific theme music.
  • 1.2.3: Added biome specific stalactite variations.
  • 1.2: Introduced.
Surface Layers Forest • Desert • Ocean • Snow • Jungle • Mushroom • Evil Biome (The Corruption • The Crimson) • The Hallow • Space
Underground Layers Underground • Cavern • Underground Snow • Desktop only.png Underground Desert • Underground Jungle • Underground Mushroom • Underground Corruption • Underground Crimson • Underground Hallow • The Underworld
Special Biomes Meteorite • Desktop only.png Granite Cave • Desktop only.png Marble Cave • Spider Nest • Bee Hive • Dungeon • Lihzahrd Temple
Other Living Tree • Desktop only.png Enchanted Sword Shrine • Floating Island • Underground Cabin • Chasm • Pyramid • Jungle Shrine • Desktop only.png Living Mahogany Tree • Mobile only.png Jungle Sanctum • Ruined House