If enough Corruption manages to take over a new area, then that area will eventually adopt the Corruption's theme music, background, and water color. Chasms, Demon Altars, and Shadow Orbs will only appear upon world generation, and will not spawn in a Corruption area that has formed through spreading. The Corruption spreads, meaning it slowly converts adjacent tiles to their Corruption variants. Chasms consist of Ebonstone, which can be blown up by explosives, mined with a Nightmare/ Deathbringer Pickaxe or higher, or purified to Stone by using Purification Powder or the Clentaminator. Demon Altars generally line the chasm's passages, appearing inside and around it. Chasms lead downwards in a straight line, some crossing a horizontal connector, ending with a Shadow Orb. The Corruption contains multiple chasms, underground extensions of the biome.

Corruption enemies tend to have slightly lower stats, such as health, defense, and damage. The tools, weapons, and armor obtained via Corruption materials are generally faster, but slightly less powerful than those obtained via Crimson materials. Both contain similar hazards and feature their own unique enemies, items, and blocks. Every world will contain one of the two, generated randomly (each with a 50% chance of occurring) or chosen by the player upon world creation ( only after the Wall of Flesh has been defeated in any world).

The Corruption is an evil biome with a dark purple wasteland, death, and decay theme, with an evil forest design to it, in contrast to the red gore theme of its counterpart, The Crimson.

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