Chasms

A Chasm is a deep vertical tunnel whose walls are made of Ebonstone, with Ebonstone Wall backgrounds, found throughout The Corruption. They are usually home to continuously-spawning swarms of Eater of Souls. Chasms generally reach depths around where the Cavern layer begins. When instead of Corruption, there is a Crimson biome, chasm have Crimstone as its walls and Crimstone wall as a background wall. There are a lot of Blood Crawlers down there.

At the bottom of most Chasms, a Shadow Orb can be found behind a small wall of Ebonstone. To reach the Shadow Orb, the player must use at least a Nightmare Pickaxe, Bombs/Dynamite, or use Purification Powder to turn the Ebonstone into common Stone and mine it with any Pickaxe.

There is usually a horizontal underground tunnel connecting most of the Chasms in a given Corruption area. Demon Altars are common in and around this adjoining tunnel.

Tips

 * Players without the ability to mine Ebonstone, and who have not yet obtained a climbing aid like the Grappling Hook, will want to avoid falling into Chasms. Some Chasms can be very difficult or impossible to climb out of by merely jumping between ledges.
 * Its best to use a weapon that has long reach when going down the Chasms to knock out Eater of Souls that usually cluster on the other side of the Chasm.
 * If you have the chance it's best to cover off the chasm to avoid falling into it at a later time.