Talk:The Corruption/@comment-76.182.33.172-20110727123409

Seems as if the number of Ebonstone blocks plus the number of dirt blocks covered with corrupted grass within your vicinity (which may be larger than what you see in a 1280x1024 resolution screen) need to be 500 blocks or more in order for the game to determine that you're inside a valid corrupted area (where the Corruption theme plays, Devourers may spawn, and the Eater of Worlds may be fought). I found that out after I dug out all the Ebonstone and corrupted grass from a single Corruption zone (leaving behind just the walls, demon altars, and shadow orbs, though I'll break those later), when I then decided to create an arena (which also doubled as a zoo for players to be able to view Eaters of Souls in relative safety) for players to be able to fight against the Eater of Worlds.