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Evil Biome

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An Evil Biome is a naturally spreading, hazardous biome that has generally negative effects on entities inside or around it. The Corruption or The Crimson will always spawn in a world. A generated world will only contain one of the two biomes, with a 50/50 chance of one of them generating. Desktop Version If a player has entered Hardmode in at least one world, they can choose whether they want Corruption or Crimson to generate in their world. However, they can still leave it up to the 50/50 setting.

This biome is saved as the world's naturally generated Evil Biome, and determines:

These will not be affected by artificial Corruption/Crimson (which can be created from materials brought over from another world).
The type of Biome Key Desktop VersionConsole Version / Biome Key MoldOld-gen console versionMobile Version3DS Version dropped by enemies is dependent on the biome the enemy is killed in, regardless of whether it is a "natural" biome or "artificial" biome.

The biome is predominately comprised of chasms made from corrupted stone (Ebonstone or Crimstone). However, the biome can overlap other biomes, providing corrupted versions of the Forest, Desert, Snow, Jungle or Ocean biomes. This can be evidenced by the presence of purple/red grass and Ebonwood/Shadewood trees, purple/red Cactus and Ebonsand/Crimsand, Purple Ice/Red Ice, or purple/red Palm Trees. Unfortunately, a corrupted Jungle is merely turned into a corrupted Forest, and is only evidenced by a large quantity of water and mud blocks.

While in Pre-Hardmode, the only biome capable of spreading corruption is corrupted surface Forest with its corrupted grassy blocks (see below for details).

Corruption and Crimson exclusives[edit | edit source]

Certain items are exclusive to either The Corruption or to The Crimson.

The following items are considered counterparts to each other. It should be noted that counterparts do not share the same stats. This content is transcluded from Corruption and Crimson counterparts.

The Corruption The Crimson Source
MusketMusket The UndertakerThe Undertaker Shadow Orbs / Crimson Hearts
VilethornVilethorn Crimson RodCrimson Rod
Ball O' HurtBall O' Hurt The Rotted ForkThe Rotted Fork
Band of StarpowerBand of Starpower Panic NecklacePanic Necklace
Shadow Orb (item)Shadow Orb (item) Crimson Heart (item)Crimson Heart (item)Desktop VersionConsole Version
Rotten ChunkRotten Chunk VertebraeVertebrae enemies
Cursed FlameCursed Flame IchorIchor
Vile MushroomVile Mushroom Vicious MushroomVicious MushroomDesktop VersionConsole Version Corrupt / Crimson grass
Demonite OreDemonite Ore Crimtane OreCrimtane Ore Eater of Worlds / Brain of Cthulhu,
environment, Eye of Cthulhu
Shadow ScaleShadow Scale Tissue SampleTissue Sample Eater of Worlds / Brain of Cthulhu
Eater of Worlds MaskEater of Worlds Mask Brain of Cthulhu MaskBrain of Cthulhu Mask
Eater of Worlds TrophyEater of Worlds Trophy Brain of Cthulhu TrophyBrain of Cthulhu Trophy
Eater's BoneEater's Bone Bone RattleBone RattleDesktop VersionConsole Version
Worm ScarfWorm ScarfDesktop VersionConsole Version Brain of ConfusionBrain of ConfusionDesktop VersionConsole Version Eater of Worlds Treasure Bag /
Brain of Cthulhu Treasure Bag
Dart RifleDart RifleDesktop VersionConsole Version Dart PistolDart PistolDesktop VersionConsole Version Corrupt Mimic / Crimson Mimic
Clinger StaffClinger StaffDesktop VersionConsole Version Life DrainLife DrainDesktop VersionConsole Version
Putrid ScentPutrid ScentDesktop VersionConsole Version Flesh KnucklesFlesh KnucklesDesktop VersionConsole Version
Chain GuillotinesChain GuillotinesDesktop VersionConsole Version Fetid BaghnakhsFetid BaghnakhsDesktop VersionConsole Version
Worm HookWorm HookDesktop VersionConsole Version Tendon HookTendon HookDesktop VersionConsole Version

The Corruption[edit | edit source]

Chasms of The Corruption

The Corruption presents a purple "corrupted" theme, with purple grass, trees and stone. Thorny Bushes and enemies like the Eater of Souls and Devourers exist in the biome, presenting dangerous and potentially deadly situations for newer players. The Eater of Worlds can only be summoned in the corruption. The Corruption contains deep chasms, which if not pursued carefully, can result in death from fall damage. Shadow Orbs exist in underground portions of the corruption, mostly at or near the bottom of chasms, in which case you will have to mine to them. Destroying your first shadow orb will always drop a Musket and some Musket Balls, which automatically fulfills the criteria for the Arms Dealer to arrive. Destroying 3 shadow orbs will result in the spawning of the Eater of Worlds, so it is advised that you gear up before doing so.

Corruption Contents[edit | edit source]

Characters
Unique Treasures
Unique Drops
From any enemy in Hardmode:
Underground Corruption:
From World Feeders and Clingers (Hardmode):
From Corrupt Slimes and Slimelings (Hardmode):
From Corruptors (Hardmode):
From vegetation:
For Sale

The Crimson[edit | edit source]

Chasms of The Crimson

The Crimson presents more of a red, gory theme, which differs it from its counterpart, the corruption. Unique enemies that only appear on a crimson world include Blood Crawlers, Face Monsters and Crimeras. The Brain of Cthulhu, the alternative to the Eater of Worlds, can only be summoned in the crimson. Like the corruption, the crimson contains red grass, trees and stone. In the crimson, the stone is called crimstone, and can only be mined with a Nightmare Pickaxe/Deathbringer Pickaxe or better. Like the corruption, the crimson contains deep chasms, which can also result in death if not pursued carefully. Instead of shadow orbs, the crimson contains Crimson Hearts. Destroying your first crimson heart will give you the Undertaker and some musket balls, which, like shadow orbs, will instantly fulfill the criteria for the Arms Dealer to arrive. Destroying 3 crimson hearts will result in the spawning of the Brain of Cthulhu.

Contents[edit | edit source]

Spread[edit | edit source]

Both the Corruption and Crimson will spread throughout a world in pre-Hardmode, and more aggressively in Hardmode:

  • Corrupt grassCorrupt grass and Crimson grassCrimson grass will spread similarly to normal grassnormal grass, converting adjacent Dirt tiles with at least one side open to air (only in the Surface Layer).
  • Corrupt and Crimson grass can displace normal grass.
  • Thorny Bushes can grow in the Corruption and Crimson a distance of 6 tiles in any direction, which can furthermore spread the Corruption and Crimson, even over non-corruptible blocks.
  • Non-corruptible blocks (blocks that Corruption and Crimson cannot spread to) include Wood (any sort), Clay, Ash, Silt, Obsidian, Ores, Gems and Bricks.
  • Hallowed grassHallowed grass can convert both normal and Crimson grass, and compete with Corrupt grass.

pre-Hardmode[edit | edit source]

  • Only Corrupt grass and Crimson grass can spread their respective evil biome; Stone (Stone Block Ebonstone Block Crimstone Block), Sand (Sand Block Ebonsand Block Crimsand Block), and Ice (Ice Block Purple Ice Block Red Ice Block) will not convert other blocks and cannot be converted.
  • A Sunflower planted on normal grass can halt the spread of both Corruption and Crimson.
  • If the player brings Hallowed materials over from a Hardmode world, Hallowed grass (created from Hallowed Seeds or Holy Water) will proceed to spread, converting both normal and Crimson grass, and competing with Corrupt grass. Other Hallowed blocks (PearlstonePearlstone, PearlsandPearlsand, and Pink IcePink Ice) will have no effect.

Hardmode[edit | edit source]

In Hardmode, the Corruption and Crimson will spread much more aggressively, however defeating Plantera can slow the progression.

  • Sunflowers can no longer stop the spread.
  • Ebonsand,Crimsand, Ebonstone, Crimstone, Purple Ice and Red Ice will now spread their designated biomes.
  • Mud can now be converted to dirt, leaving the jungle vulnerable to the Corruption and Crimson.
  • Jungle Thorny Bushes can now be converted to Corruption and Crimson.
  • Blocks that are up to three tiles away from an existing Corrupt or Crimson block can be converted (even if incorruptible blocks are in the way).

Corrupted and Crimson Deserts[edit | edit source]

See also: Corrupted Desert, Crimson Desert
A Corrupted Desert.
A Crimson Desert.

In Hardmode, the Corruption and Crimson can spread through the desert, therefore creating Corrupted and Crimson deserts. In the Corruption, sand is replaced with Ebonsand, and in the Crimson, sand is replaced with Crimsand. Unique enemies not found in the normal Corruption and Crimson can also be found in the biome's desert variant.

Purification[edit | edit source]

See also: Guide:Maintaining world purity
A properly contained Corruption and Hallow, which, while not considered an evil biome, can eventually spread out of control.

In Hardmode, the corruption and crimson can spread out of control, sometimes even taking over an entire world if nothing is done. Therefore, efforts must be made if you don't want your world to be overrun.

In Pre-Hardmode, one can use Purification Powder to remove portions of the corruption/crimson to help slow down the spread. However, it isn't until hardmode that the biomes present much of an issue.

In Hardmode, a good strategy is to dig a 3 tile wide hole around the corruption/crimson, containing it. However, near the surface, Thorny Bushes can spread the corruption up to 6 blocks, so the hole needs to be 6 tiles wide.

However, if you want to make removing the corruption/crimson a feasible task in Hardmode, obtaining the Clentaminator is recommended. Purchasing the Clentaminator requires 2 Platinum Coin. It can be purchased from the Steampunker, an NPC who arrives after at least one mechanical boss has been defeated. Purchase green solution from the steampunker, and use the clentaminator to wipe out the corruption/crimson. Note that you should keep small contained pockets of the biome, as the enemies that spawn within the corruption/crimson have unique drops that are required to advance in the game.

Tips[edit | edit source]

  • One way to know if your world has Corruption or 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.
  • Desktop VersionConsole Version 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", and the step in world generation in which the Corruption is created is called "Making the world evil". 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.
  • Desktop VersionConsole Version In Expert mode, the Vampire Knives are highly useful in virtually all situations. However, the Crimson's boss accessory, the Brain of Confusion, pales heavily in comparison to its' Corrupt counterpart, the Worm Scarf, meaning that the two balance each other out.