What Can Corruption Spread To in Terraria? A Comprehensive Guide
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The insidious Corruption biome in Terraria is a force to be reckoned with, capable of reshaping your world in its image. Understanding its spreading mechanics is crucial for any player looking to protect their builds and maintain a healthy environment. At its core, the Corruption spreads by converting various blocks into its tainted equivalents. This spread is not limitless, and certain strategies can help you manage or even halt its progress. Let’s delve into the specifics of what the Corruption can spread to, and how you can keep it at bay.
How Does Corruption Spread?
The Corruption’s spread is primarily about block conversion. Initially, it starts on the surface with corrupted grass, and then it can tunnel underground, spreading into the Cavern layer after defeating the Wall of Flesh and entering Hardmode. Here’s a breakdown of how the corruption works:
- Grass: Corruption begins by turning normal grass into corrupt grass. From there it spreads to nearby dirt blocks to convert them. This is the most common and visible method of spread.
- Stone: Stone blocks are converted to Ebonstone when they are in close proximity to corrupt grass. This is key for the corruption moving underground.
- Sand: Sand blocks are converted into Ebonsand. This can allow the biome to spread across deserts more quickly, as well as downwards into underground sand caverns.
- Ice: In Hardmode, Corruption can convert ice blocks to purple ice.
- Walls: Certain natural cave walls can be corrupted. Mottled Stone Walls become Corrupt Pustule Walls, Fractured Stone Walls become Corrupt Tendril Walls, Worn Stone Walls become Corrupt Growth Walls, and Stalactite Stone Walls become Corrupt Mass Walls.
- Backgrounds: The backgrounds of the world are also altered to reflect the Corruption biome visually, adding to the ominous atmosphere.
Once in Hardmode, the spread of Corruption, along with the Crimson and Hallow, accelerates dramatically. The Corruption can then convert these blocks at an increased rate and greater radius making it a real threat.
Factors Affecting Corruption Spread
- Proximity: The Corruption spreads by converting blocks within a radius of up to 6 tiles in all directions, influencing blocks up to 3 blocks away much like other biome-spreading tiles.
- Hardmode: Defeating the Wall of Flesh dramatically increases the speed and range of the corruption spread. This is when it becomes a serious threat.
- Altars: Destroying Demon Altars has a 66.67% chance of converting a random stone block in the Cavern layer to Ebonstone, aiding the underground spread.
What Blocks are Resistant to Corruption?
Fortunately, not all blocks are vulnerable to the Corruption. Certain materials can act as barriers, preventing the biome’s spread. Here are key blocks resistant to corruption:
- Clay: Clay blocks are completely immune to corruption, crimson, and Hallow.
- Bricks: Regular bricks (such as gray brick) cannot be corrupted, making them excellent for constructing protective barriers.
- Silt: Similar to clay, silt cannot be converted by the Corruption.
- Ash: Ash blocks are also resistant to the spread of Corruption.
- Wood: Wood is an early game material, that works as a barrier.
- Sunflowers: The two tiles underneath a sunflower are protected from Corruption, Crimson, and Hallow spread. Additionally, they reduce the total corruption score in an area by 5.
Strategies to Combat Corruption Spread
Understanding what the Corruption can spread to and what it cannot, is essential for constructing a defense strategy. Here are a few effective methods:
- Trenching: Early game, dig a 3-tile wide trench around the edges of your base or sensitive areas. The trench, lined with non-corruptible blocks like wood, brick, or clay, will prevent the Corruption’s spread.
- Clentaminator: In Hardmode, the Clentaminator becomes an invaluable tool. It uses Green Solution to purify corrupted blocks, reverting them to their original form.
- Barriers: Constructing thick walls out of non-corruptible materials like brick or clay will create a physical barrier that the Corruption cannot pass.
- Hallow: While Hallow is also a spreading biome, it can be used to prevent corruption spread by overtaking the corrupt area.
- Sunflowers: Placing sunflowers strategically can prevent grass conversion, but is better used to reduce the corruption of an area than as a barrier.
By combining these methods, you can create a robust defense against the Corruption, protecting your world and allowing you to enjoy everything Terraria has to offer.
Frequently Asked Questions (FAQs)
Here are some frequently asked questions regarding the spread of Corruption in Terraria:
1. Can the Corruption spread to the entire world?
Yes, if left unchecked, the Corruption (along with the Crimson and Hallow) can spread to the entire world. This is especially true in Hardmode, where the spread accelerates significantly. However, this takes a significant time to occur.
2. How far can the Corruption spread at once?
Corruption can grow 6 tiles in all directions and spread its biome up to three blocks away. This means that blocks further than 6 tiles away will not be immediately converted unless the biome has spread closer to them.
3. Does Hallow spread faster than corruption?
No, all three spreading biomes (Corruption, Crimson, and Hallow) spread at the same rate. The Hallow, however, can overtake Crimson grass.
4. Can corruption spread through ice?
Yes, in Hardmode the Corruption can spread through ice, creating purple ice blocks. However, it cannot spread through snow blocks.
5. Does breaking altars spread corruption?
Yes, breaking Demon Altars or Crimson Altars has a 66.67% chance to convert a random stone block in the cavern layer to Ebonstone/Crimstone, thus spreading the Corruption or Crimson.
6. Do sunflowers stop corruption?
Yes, sunflowers directly prevent the two tiles underneath them from being corrupted, crimsoned, or Hallowed. They also reduce an area’s total Corruption rating by 5 tiles.
7. Can gray brick be corrupted?
No, gray brick, and other types of bricks, are resistant to the spread of Corruption, Crimson, and Hallow making them perfect building materials for walls around your base.
8. Does Demonite count as corruption?
No, Demonite Ore itself does not spread the Corruption, unlike its Crimson equivalent, Crimtane Ore.
9. How do you stop the Hallow from spreading?
Just like corruption, the Hallow can be stopped by creating trenches, using the Clentaminator with green solution, or building walls from uncorruptable blocks. You can also use corruption to combat hallow as they cannot overlap.
10. Can you summon the Eater of Worlds in Crimson?
Yes, while the Crimson boss is the Brain of Cthulhu, you can summon the Eater of Worlds by creating a corruption biome of at least 200 blocks of ebonstone or equivalent, then using the worm food item in the biome.
11. What spreads the crimson?
Crimson is spread via Crimson Seeds, Vicious Powder, Blood Water, or the Clentaminator using red solution. Red solution is purchasable from the Steampunker during a Blood Moon in Crimson worlds.
12. Can you spread Corruption with the Clentaminator?
Yes, the Clentaminator can spread Corruption, Hallow, and Crimson. Purple solution spreads corruption and can be used to turn the world evil into the corruption if desired.
13. Can Hallow spread through the Jungle?
No, the Hallow cannot spread through mud areas, such as those found in the Jungle or Glowing Mushroom Biomes. It only spreads through convertable blocks.
14. How many altars should I destroy?
The best strategy is often to destroy six altars for a balance of ore and infection. Destroying three reduces the risk of infection but makes it harder to find ore. Every 3 altars smashed reduces the amount of new ores, while increasing spread rates.
15. Does Hallow stop corruption?
The Hallow can overtake corruption if it converts the same blocks into the hallow. However it does not explicitly stop the spread. The hallow will spread at the same rate as other biomes.
By understanding the mechanics of Corruption spread and how to counter it, you can successfully protect your Terraria world from the encroaching darkness. Use this knowledge to fortify your base and embark on epic adventures without the constant threat of biome takeover. Good luck, and may your world remain corruption-free!