Eater of Worlds

The Eater of Worlds is similar to the Devourer but with more health, and splits into smaller worms as it takes damage. It appears to be made out of multiple Eaters of Souls which are linked to each other.

The Eater of Worlds is either summoned in The Corruption with Worm Food, which is made out of Rotten Chunks (dropped by Eater of Souls) and Vile Powder (made from Vile Mushrooms found in corrupted areas); or by destroying two-three Shadow Orbs.

To defeat this boss, one must destroy each and every individual Eater of Souls that makes up its body, each having 200 life. It is pretty simple to dodge them, just keep moving around. Weapons like Flails, Vilethorn (if you have mana) and fast swords like Muramasa are good choices,Grenades are also a good option to have. Damaging more than one part at a time is the key to killing this boss. The passive way is to spam the floor with spiky balls, which you can get from the goblin army, and wait for the boss to simply pass through these balls. When defeated, a message will be displayed signaling the boss battle is over.

The Eater of Worlds drops Coins, Demonite Ore, Shadow Scales, a piece of Shadowscale Armour and sometimes a Heart Crystal.

A glitch can occur if the Eater of Worlds is summoned by the destruction of a Shadow Orb. If the Eye of Cuthulu is allready spawned, the Eater of Worlds dies itself immediately, presumably because the game can't handle two bosses alive at the same time. (might work with any two bosses, needs testing)

Bug
A few players have come across a bug where they defeated the Eater of Worlds after they took away most of his body parts but then died. The players got all the items+coins he supposedly dropped though.

When Eater of Worlds runs away after the player has died, a message appears saying that it has been defeated.