What happens if you don't stop the Corruption in Terraria?

The Corruption and Crimson biomes in Terraria are some of the most dangerous areas, and they are essential for gathering materials throughout the game. However, in Hardmode, they can spread uncontrollably and gradually consume the entire map if left unchecked.
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Should I stop the Corruption in Terraria?

As desirable as completely eliminating the spread might sound, leaving a part of the world with Corruption/Crimson and Hallow is not a bad idea if contained properly, since there are a lot of items exclusive to these biomes the player may need later, such as Souls and Biome mimics.
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Is it possible to have 0 Corruption in Terraria?

Once the biome is purified, search the surface and make sure there are no additional Crimson biomes. Talk to the Dryad. Select the "Status" option so she'll tell you how much Crimson/Corruption you have. Hopefully she'll report 0% and the achievement will pop.
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What happens if you let Corruption spread Terraria?

As soon as you enter Hardmode in Terraria, the world's Corruption, Crimson, and the new Hallow biome all start to expand outwards. Rapidly. If left to their own devices, these biomes will eventually swallow your entire world, destroying your NPC villages and making life generally difficult.
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How do you permanently remove Corruption in Terraria?

If for some reason you want to remove every last scrap of Corruption despite there being no reward for doing so, you'll have to Clentaminate everything (And I mean EVERYTHING.) Dig a network of tunnels throughout your entire world that are no more than 120 blocks apart, travel through them, spray thoroughly.
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How to Stop Corruption Spread in Terraria

Is Crimson better than Corruption?

Depends, corruption is easier but has weaker loot while the crimson has very annoying enemies to deal with early game but ends up with much stronger benefits in hard-mode like vampire knives and ichor.
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Do sunflowers stop Corruption?

Sunflowers provide the following functions: The two tiles directly underneath them cannot become Corrupted, Crimsoned, or Hallowed, even in Hardmode. In some cases, this can prevent Corrupted and Crimson grass from spreading sideways.
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Does killing Plantera stop the Corruption?

While its spreading capabilities are very limited during pre-Hardmode, it spreads much faster and more aggressively after defeating the Wall of Flesh. Defeating Plantera for the first time reduces the speed of the Corruption's spread by 50%.
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Is Hallow better than Corruption?

The Hallow is most effective when used to counter the spreading of Corruption; however, the corruption and hallow can still spread over each other, just very slowly.
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Can Hallow overtake Corruption?

Hallow CAN spread over corruption/crimson stone.

"Both the Hallow and Corruption cannot convert each other. So corruption surrounded by hallow will not spread, and likewise the other way around. Hallowed grass will take over Crimson grass, but still stops at Crimstone."
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What does the Dryad say when the world is 0 corrupt?

The world has no Corruption, Crimson, or Hallow. "The world is in balance."
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Do demon altars count as Corruption?

They are not counted. It took me awhile finding that last chunk. Explored all around the natural spawn points of corruption, used the Clentaminator with Green Solution and just hosed down every bit of screen space I could find.
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Can the underworld be corrupted in Terraria?

Small pockets of Underground Corruption can be created through the breaking of Demon Altars, which can convert a single random Stone Block in the world into Ebonstone upon destruction. The Underground Corruption does not suppress the spawn of other underground and cavern enemies.
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Can you get rid of corruption before Hardmode?

Pre-Hardmode Preparation

Dig a tunnel three to six blocks wide around the entirety of the evil biome to contain it. By digging a tunnel this wide, you will block the corrupted blocks from spreading past it. You should do this before defeating the Wall of Flesh boss.
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Can gray bricks be corrupted?

Gray Brick is a basic brick. It is often used in construction, as it requires only common Stone blocks to produce and, unlike its constituent materials, is resistant to the spread of Corruption, Crimson, and Hallow.
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Is Hallow an evil biome?

The Hallow is considered an opposite to the Corruption or Crimson biomes, since it can spread like they can, and it has light themed items instead of the Evil biomes' Night or evil themed items.
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Does Hallow count as evil?

Based on the source code, the Dryad considers the Hallow to be "good", as opposed to the Corruption or Crimson, which she considers "bad." However, she does not consider the world to be "pure" until all three are eradicated.
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Can Crimson take over Hallow?

No, they can't covert one over the other, however you can use a Clentaminator to directly convert crimson/corrupt blocks into thier hallowed counterparts, though it won't spread beyond the blocks you sprayed unless it's near a normal convertable block like dirt blocks covered in normal grass or regular sand blocks, etc ...
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How do you completely purify a Terraria world?

The most reliable way to completely convert or purify a world is to dig multiple Hellevators with a horizontal distance of 120 or 190 tiles (since 60 tiles is the maximum range of the Clentaminator, 95 for Terraformer) between each other, then glide down each one using Wings or a Featherfall Potion, while spraying both ...
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Can the jungle get corrupted in Terraria?

It is a good idea to section off the Jungle before activating Hardmode, or the Jungle might quickly be overtaken by the evil biome (Corruption/Crimson) and eventually be eliminated. The evil biome converts Mud Blocks within a three-tile radius of any corrupted block to dirt, and grows Corrupt/Crimson grass on it.
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What blocks Cannot be corrupted in Terraria?

The Corruption and Hallow cannot spread through clay, bricks, silt, or ash so you can use those materials to your advantage like making a barrier around your base. Sunflowers will also stop The Corruption from spreading pre-Hard Mode.
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What killed my sunflowers?

Sunflowers can become severely damaged and even die because of mold, mildew, fungi, insects, etc.
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Can NPCs live in the Hallow?

Unlike Corruption/Crimson, NPCs can live in the Hallow without leaving. In fact, it is a good idea to have your base Hallowed, as this will stop the evil biomes from coming towards it.
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How far can Corruption spread Terraria?

corrupt/crimson blocks can corrubt curruptible blocks withing 3 blocks range. and in hardmode, stone, ice, sand, etc. is corruptible too. but as long as corrupted blocks are more than 3 blocks distance from other corruptible blocks, it won't spread there.
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