The Crimson

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Two Crimson chasms.
See also: Underground Crimson

"Making the world bloody..."

The Crimson is a hazardous surface biome that presents a red gore theme, in contrast to the Corruption's purple diseased wasteland theme. A generated world will contain one of the two, chosen at random during world creation, each with a 50% chance of occurring. The two contain similar hazards, though the Crimson is often considered by players to be the more difficult of the two. Each have their own unique respective enemies, items, and blocks. The tools, weapons and armor obtained via Crimson materials have minor advantages over those obtained via Corruption materials, but has the trade-off that Crimson enemies are slightly stronger. New players should avoid The Crimson before obtaining better gear.

The Crimson contains multiple Chasms, deep pits in the ground that lead to underground tunnels. The chasms in the Crimson cut at angles into the terrain, lead to large circular cavities, then branch off into smaller veins that lead to Crimson Hearts. Crimson Altars generally line the chasm's entry passage, appearing in and around it. Chasms are lined with Crimstone, which can only be mined with a Nightmare Pickaxe/Deathbringer Pickaxe or higher.

Crimson spreads in the same manner as Corruption, replacing Grass with Crimson grass, and in Hardmode, replacing Sand with Crimsand, Stone Blocks with Crimstone, Ice Blocks with Red Ice Blocks and the Underground Crimson is formed. Chasms, Crimson Altars and Crimson Hearts will not spawn in a Crimson area that has formed through spreading; however Crimson enemies like the Face Monster, will spawn. If enough Crimson takes hold in a new area, this area will adopt theme music, background, and water color.

Purification Powder can be used on crimtane blocks to turn them into their regular counterparts. "Purified" blocks can still become Crimson again afterwards.

Contents[edit | edit source]

NOTE : View Underground Crimson for the mobs that spawn during Hardmode in and under the cavern layer.

The Crimson
Characters Unique Treasures Unique Drops For Sale
Blood Crawler.png Blood Crawler
Face Monster.png Face Monster
Crimera.png Crimera
Brain of Cthulhu.png Brain of Cthulhu

In Hardmode:

Herpling.png Herpling
Crimslime.png Crimslime
Blood Jelly.png Blood Jelly
Blood Feeder.png Blood Feeder
Floaty Gross.png Floaty Gross
Ichor Sticker.png Ichor Sticker

Crimson Desert:

Dark Mummy.png Dark Mummy

From Crimson Hearts:

The Undertaker.png The Undertaker
The Rotted Fork.png The Rotted Fork
Crimson Rod.png Crimson Rod
Panic Necklace.png Panic Necklace
Crimson Heart (item).png Crimson Heart (item)

From Blood Crawler, Crimera,
Face Monster, Floaty Gross:

Vertebrae.png Vertebrae

From Blood Crawlers:

Blood Crawler Banner.png Blood Crawler Banner

From Crimeras:

Crimera Banner.png Crimera Banner

From Face Monsters:

Face Monster Banner.png Face Monster Banner

From Brain of Cthulhu:

Tissue Sample.png Tissue Sample
Bone Rattle.png Bone Rattle
Brain of Cthulhu Trophy.png Brain of Cthulhu Trophy
Brain of Cthulhu Mask.png Brain of Cthulhu Mask

From any enemy
in Hardmode:

Crimson Key.png Crimson Key
(1/2500 chance)Pc only.png
Crimson Key Mold.png Crimson Key Mold
(1/2500 chance)Mobile only.pngConsole only.png

From Dark Mummies

Blindfold.png Blindfold
Dark Shard.png Dark Shard
Megaphone.png Megaphone

From Herplings

Herpling Banner.png Herpling Banner
Meat Grinder.png Meat Grinder

From Crimslimes

Meat Grinder.png Meat Grinder

From Blood Feeder

Blood Feeder Banner.png Blood Feeder Banner

From Floaty Gross

Floaty Gross Banner.png Floaty Gross Banner
Vitamins.png Vitamins

From Ichor Sticker

Ichor.png Ichor

From Blood Jellys

Blood Jelly Banner.png Blood Jelly Banner

From the terrain:

Crimstone.png Crimstone
Crimsand Block.png Crimsand Block
Red Ice Block.png Red Ice Block
(Snow biome)
Shadewood.png Shadewood
Vicious Mushroom.png Vicious Mushroom

From Fishing:

Crimson Tigerfish.png Crimson Tigerfish
Hemopiranha.png Hemopiranha
Crimson Crate.png Crimson Crate

From Fishing
in Hardmode:

Bladetongue.png Bladetongue

From Painter:

Deadland Comes Alive.png Deadland
Comes Alive

Spread[edit | edit source]

In normal mode (pre-Hardmode worlds), Crimson can spread, but only under limited conditions:

  • Crimson grass can spread in a manner similar to normal grass, converting adjacent Dirt tiles with at least one side open to air (only in the Surface Layer).
  • Crimson grass can also displace normal grass. Until version, this is true unless the grass has a Sunflower planted on it.
  • Crimson grass may sprout Thorny Bushes, which can spread Crimson grass according to the same rules.

Naturally-occurring Crimson will often be halted by various natural barriers (stone, desert, etc.) before it is even discovered, but care should be taken when creating an artificial Crimson biome that it does not spread further than intended.

If all crimson and hallow blocks are purified, then when speaking to the Dryad about the world status, the Dryad will say "(The name of the world) is completely pure. You have done an amazing job!".

Hardmode[edit | edit source]

Once the Wall of Flesh is defeated, a world enters Hardmode. New areas of Crimson and Hallow are immediately created that extend from the Underworld up to the Surface, sometimes intersecting existing Crimson. Crimson begins spawning more dangerous enemies, such as the Herpling, and underground, the Ichor Sticker.

Crimson spreads much more aggressively once the world is in hardmode:

  • In addition to Crimson grass, thorns and plants, Crimstone, Crimsand and Red Ice also generate Crimson.
  • Grass can still be converted to crimson grass, and corrupt grass can cover new dirt as in regular mode.
  • Mud can now be converted into dirt.
  • Jungle grass can also be converted into crimson grass (changing the underlying block type to dirt).
  • Jungle Thorny Bushes can be converted into Crimson Thorny Bushes.
  • Stone can be converted to Crimstone.
  • Sand can be converted to Crimsand.
  • Ice can be converted to Red Ice.
  • Blocks that are up to three tiles away from an existing crimson block can be converted (even if uncorruptible blocks are in the way).
  • Sunflowers can no longer stop the spread

The Crimson does not spread through other materials, even natural materials like clay and snow. Silt can be converted as part of the initial burst when you first defeat the Wall of Flesh, but not at other times.

In order to stop the spread of Crimson in Hardmode, the player must create a gap of at least three tiles containing empty space or non-corruptible blocks. Hallow blocks will also stop the spread of Crimson, but will spawn its own hazards as well.

Crimson Desert[edit | edit source]

A Crimson Desert.

In Hardmode, Crimson spreads through Deserts, transforming it into Crimson Desert. It is very similar to the Crimson: The theme music is the same, and enemies are the same, with the addition of Dark Mummies.

Sand is replaced by Crimsand. Although their color is different, cacti still drop ordinary cactus when cut. Waterleaf is not able to grow in crimson deserts.

Notes[edit | edit source]

  • Crimson can be spread artificially using the Clentaminator with the Red Solution, obtainable from the Steampunker during a Blood Moon in Crimson worlds (she sells the Purple Solution in a Corruption world instead).
  • The Steampunker will only sell the Flesh Cloning Vat and Red Solution in a world that generated with Crimson naturally. Artificially creating a Crimson biome will not cause her to sell them.
  • Creating a new Crimson biome requires at least 200 Crimson blocks, such as Dirt with Crimson grass, Crimstone, Crimsand or Red Ice Blocks. Although Crimson replaces Corruption at world generation, it does not prevent Corruption from being artificially created in a Crimson world, and vice versa. Spreading remains normal.
  • A three tile wide gap may not be enough to stop the spread of the Crimson on the surface, as crimson grass can spawn vicious bushes, which can bridge the gap and continue the spread. It is recommended you have three tiles of non corruptable blocks filling the gap in order to prevent this, both above the surface a bit, and down to the underground layer.
  • Console only.png Mobile only.png Trees in the Crimson do not drop Acorns.

Tips[edit | edit source]

  • One way to know if your world has Crimson is to ask the Guide. He will tell you to break a Crimson Heart if your world has Crimson, or to break a Shadow Orb if the world has Corruption.
  • Pc only.png In 1.3, one half of the world generation progress bar will be green, and the other half purple or red, depending on if the world is to have Corruption or Crimson. The step in world generation in which the Crimson is created is called "Making the world bloody." Also, a tree at the side of the world name in world selection has one green/normal side, the other purple/red (indicating Corruption/Crimson respectively). In hardmode, part of the tree will be yellow, representing the Hallow.
  • Pc only.png In Expert Mode, it is advised to have access to a Crimson biome because you can possibly get the Vampire Knives, which help tremendously.

History[edit | edit source]

Surface Layers Forest • Desert • Ocean • Snow • Jungle • Mushroom • The Corruption • The Crimson • The Hallow • Space
Underground Layers Underground • Cavern • Underground Snow • Pc only.png Underground Desert • Underground Jungle • Underground Mushroom • Underground Corruption • Underground Crimson • Underground Hallow • The Underworld
Special Biomes Meteorite • Floating Island • Pc only.png Granite Cave • Pc only.png Marble Cave • Spider Nest • Bee Hive • Dungeon • Lihzahrd Temple
Other Living Tree • Pc only.png Enchanted Sword Shrine • Underground Cabin • Chasm • Pyramid • Jungle Shrine • Pc only.png Living Mahogany Tree • Ruined House