
The Crimson is an evil biome with a fleshy infection and a red gore theme. It is generated randomly and contains multiple chasms, with entrances on the surface that lead to large, circular cavities. The Crimson spreads, converting adjacent tiles to their Crimson variants. It can be created or spread using Crimson Seeds, Vicious Powder, Blood Water, or the Clentaminator with Red Solution. However, Crimson cannot spread to Mushroom Grass, and Mushroom Grass does not get corrupted.
| Characteristics | Values |
|---|---|
| The Crimson | An evil biome with a fleshy infection and a red gore theme |
| Generated randomly, with a 55% chance of appearing | |
| Contains multiple chasms, with entrances on the surface leading to a large, circular cavity | |
| Branches off into small "fingers" ending with a Crimson Heart | |
| Crimson Altars line the chasm's passages | |
| Consists of Crimstone, which can be blown up by explosives | |
| Slowly converts adjacent tiles to their Crimson variants | |
| If it takes over a new area, that area will adopt the Crimson's theme music, background, and water colour | |
| Sand is replaced by Crimsand | |
| Waterleaf cannot grow in Crimson Deserts | |
| Crimson Chasms found in Ice biome | |
| Crimson Snow biomes are created when Crimson spreads into a Snow biome during Hardmode | |
| Can be created or spread using Crimson Seeds, Vicious Powder, Blood Water, or the Clentaminator with Red Solution | |
| Cannot spread to Mushroom Grass |
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What You'll Learn

Mushroom grass is immune to corruption
In the video game Terraria, mushroom grass is immune to corruption. While mud near the corruption will still turn to dirt, the grass itself cannot be corrupted. This is in contrast to other biomes, such as the jungle, which can be consumed just as quickly as corruption and crimson.
The Crimson is an evil biome with a fleshy infection and a red gore theme. It is generated in every world, alongside its counterpart, the Corruption, which has a dark purple wasteland theme. The Crimson spreads by slowly converting adjacent tiles to their Crimson variants. For example, sand is replaced by crimsand, and waterleaf is unable to grow.
While the Crimson spreads, it does not take over mushroom biomes in the same way. Mushroom grass is resistant to the Crimson, although the mud near it will still be affected and turn to dirt. This is because the Crimson lacks the "change mud" property and only spreads by stones and the grass on above-ground dirt.
Despite being immune to the Crimson, maintaining a mushroom biome can be challenging. In a normal playthrough, building a substantial mushroom biome requires planting mushroom seeds on mud and letting them spread, which is a time-consuming process. Additionally, this method does not prevent the spread of the Crimson through hidden veins of stone or sand.
Overall, while mushroom grass is immune to corruption by the Crimson, it requires careful maintenance to preserve the integrity of the mushroom biome as a whole.
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Crimson can spread into other biomes
The Crimson is an evil biome with a fleshy infection and a red gore theme. It is generated randomly, and every world will contain either the Crimson or its counterpart, the Corruption. The Crimson spreads, slowly converting adjacent tiles to their Crimson variants. This means that if The Crimson is generated near another biome, it will slowly spread into that biome. For example, if a Crimson biome overlaps a Desert biome, the sand will be converted to Crimsand, and the biome will become a Crimson Desert. Similarly, when The Crimson spreads into a Snow biome, the ice will be converted into Red Ice, creating a Crimson Snow biome.
The Crimson can also spread into the Glowing Mushroom biome. However, it is worth noting that Mushroom Grass cannot be corrupted, though mud near The Crimson will turn to dirt. The Crimson can be spread artificially using Crimson Seeds, Vicious Powder, Blood Water, or the Clentaminator with Red Solution. The Clentaminator is a tool used to convert blocks and plants to different biome equivalents. The converted biome type is determined by the ammunition solution used. The Clentaminator can be used to convert between the Jungle and Glowing Mushroom biome, changing the respective grasses.
The Crimson also contains multiple chasms, which are extensions of the biome into the underground. Every chasm has an entrance on the surface and leads to a large, circular cavity, which then branches off into small "fingers" that end with a Crimson Heart. If enough of The Crimson manages to take over a new area, that area will eventually adopt The Crimson's theme music, background, and water colour.
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Crimson is an evil biome
The Crimson is an evil biome with a fleshy infection and a red gore theme, in contrast to the dark purple wasteland theme of its counterpart, the Corruption. Every world will contain one of the two generated randomly, except for special seeds (each with a 50% chance of occurring) or chosen by the player upon world creation. The Crimson contains multiple chasms, extensions of the biome into the underground. Every chasm has an entrance on the surface and leads to a large, circular cavity, then branches off into small "fingers" that end with a Crimson Heart.
The Crimson spreads, meaning it slowly converts adjacent tiles to their Crimson variants. If enough Crimson manages to take over a new area, then that area will eventually adopt the Crimson's theme music, background, and water colour. The Crimson can be created or spread artificially using Crimson Seeds, Vicious Powder, Blood Water, or the Clentaminator with Red Solution, obtainable from the Steampunker during a Blood Moon in Crimson worlds.
The tools, weapons, and armour obtained via Crimson material generally have minor advantages over those obtained via Corruption materials. However, Corruption tools are slightly faster. Crimson-themed enemies also tend to have slightly higher stats, such as health, defence, and damage. Thorny bushes will begin to sprout on the grass and will damage the player when touched.
The Crimson is a hazardous biome that has generally negative effects on entities inside or around it. It is a naturally spreading biome, and its ability to spread is very limited during pre-Hardmode. However, it spreads much faster and more aggressively after defeating the Wall of Flesh. Defeating Plantera for the first time reduces the speed of the Crimson's spread.
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Crimson and Corruption are mutually exclusive
The Crimson is an evil biome with a fleshy infection and a red gore theme. It is randomly generated in every world, in contrast to its counterpart, the Corruption, which has a dark purple wasteland theme. The Crimson spreads and slowly converts adjacent tiles to their Crimson variants. However, it is important to note that the Crimson and the Corruption are mutually exclusive. A world will always generate with one evil biome, either the Crimson or the Corruption, but never both, unless in drunk worlds.
The Crimson contains multiple chasms that extend underground, and each chasm has an entrance on the surface leading to a large circular cavity. If enough Crimson takes over a new area, that area will adopt the Crimson's theme music, background, and water colour. The Crimson can also overlap with other biomes during world generation, such as the Desert biome, creating Crimson Deserts, or the Snow biome, resulting in Crimson Snow biomes.
The Crimson is considered contagious and can spread to certain adjacent tiles. In pre-Hardmode, the Crimson spreads through grasses, but in Hardmode, it can spread directly through most soil blocks, vines, and thorny bushes. The spread of the Crimson can be slowed by defeating Plantera. Additionally, the Crimson can be artificially created or spread using Crimson Seeds, Vicious Powder, Blood Water, or tools like the Clentaminator with Red Solution.
While the Crimson can spread to various biomes, it is important to note that it cannot spread to Mushroom Grass. The Glowing Mushroom biome is immune to the spread of the Crimson and Corruption, as they cannot convert between mud and dirt. This makes the Glowing Mushroom biome a safe haven from the spread of these evil biomes.
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Crimson can be created or spread artificially
The Crimson is an evil biome with a fleshy infection and a red gore theme. It is generated randomly, and every world will contain either the Crimson or its counterpart, the Corruption. The Crimson spreads, slowly converting adjacent tiles to their Crimson variants. If enough Crimson takes over a new area, that area will adopt the Crimson's theme music, background, and water colour.
Creating an artificial Crimson biome in a Corruption world will not cause the Steampunker to sell certain items. A world with the seed 05162020 will have both Corruption and Crimson biomes.
In Hardmode, it may be worth buying Crimson Seeds from the Dryad in a Graveyard biome to create an artificial Crimson biome. This can be used to get Hemopiranhas from fishing.
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Frequently asked questions
No, the Crimson does not take over mushroom biomes. Mushroom grass cannot be corrupted. However, mud near the Crimson will turn to dirt.
The Crimson is an evil biome with a fleshy infection and a red gore theme. It is the counterpart to the Corruption, which has a dark purple wasteland theme.
The Crimson spreads by converting adjacent tiles to their Crimson variants. It can be created or spread using Crimson Seeds, Vicious Powder, Blood Water, or the Clentaminator with Red Solution.
The Clentaminator is a tool that can be used to prevent the spread of the Crimson. It converts blocks and plants to different biome equivalents, depending on the ammunition solution used. Purification Powder and Holy Water can also be used to purge the Crimson.














