Underground Corruption

The Underground Corruption is underneath the Corruption Biome. It is most recognisable by the purple background (similar to The Underground Hallow's pink background).

The mobs found in The Underground Corruption: Other mobs may wander into the Underground Corruption such Giant Bats, Giant Worms, Skeleton's, Skeleton Archers and Armored Skeleton.
 * Clinger-Drops Cursed Flames. Exclusive to Underground Corruption
 * Corrupter-Drops Rotten Flesh
 * Chaos Element-Found also in The Underground Hallowed
 * Corrupt Slime-Drops Gel and is common in the Underground Corruption
 * Mimic's- Seem to spawn more often here than anywhere else (unproven)

All mobs in the Underground Corruption (including mobs that have wandered in) have the chance to drop The Soul of Night which is used to make many rare items including Demon Wings.