terraria how to stop corruption. Some of the scariest places in Terraria are the Corruption and Crimson biomes, where evil thrives. They’re essential for gathering resources at any stage of the game, but especially so in Hardmode, where they have a chance to proliferate. These areas have the potential to quickly expand and take over the whole map if care is not taken. A few things can be done to prevent the spread of the corrupting Crimson and Corruption biomes. The most efficient methods are discussed in this manual.
A 3 tile wide trench dug on either side of the biome can be used to immediately halt the spread of the Crimson, or Terraria Corruption, at an early stage. This trench can serve as a quarantine zone if it is lined with wood or impervious tiles. Corruption in blocks can be cured with the Clentaminator in Hardmode. You can slow the spread above ground by planting Hallowed Seeds around affected areas.
Pre-Hardmode
Before reaching Hardmode, there is little a player can do to halt the spread of the Evil Biomes. The best way to keep the area from shifting is to dig a trench three tiles wide. The Hardmode biome spawns, however, will still sabotage your efforts regardless. As time goes on, you’ll want to have the ability to construct multiple 3-tile trenches. In the end, your efforts to eradicate evil will only be compounded if you eliminate the Wall of Flesh.
Bad biomes like the corruption and crimson tend to rise to the surface first. Using grass tiles from the surface world that are immune to corruption, like Sunflowers, can be a huge help at the beginning of the game.
Hardmode
Once you’ve entered Hardmode, you should be well prepared to stop the spread of the virus. You can do this by destroying Altars, but doing so could speed up the disease’s spread if you’re unlucky. Sometimes, even in a pinch, holy water won’t do the trick. It can be slowed down on Earth’s surface with the help of sunflowers and other indestructible grass tiles (like Wood).
