How to block corruption in Terraria
Stopping corruption in Terraria is key to a peaceful world. First off, sunflowers! Plant them at corruption's edges; they stop it from spreading in the early game. Next up, dig a trench at least 6 blocks wide around the areas you want to protect. Corruption can't jump across this gap. For an extra layer of security, line your trenches with non-corruptible blocks like wood or clay. Last but not least, use the Clentaminator. It's a tool you can get from the Steampunker NPC after defeating one of the mechanical bosses. It shoots solutions that clean or spread biomes, including getting rid of corruption.
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Just dig a big gap around it, at least 6 blocks wide. Easy.
Honestly? Just keep the Dryad handy and buy a bunch of Purification Powder. It's not the best method, but it's quick and works in a pinch if you're exploring or caught off-guard by spreading corruption.
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