The Eater of Worlds can be summoned by crafting Worm Food at a Demon Alter, or by destroying three Shadow Orbs. It cannot spawn naturally like The Eye of Cthulhu, or some other bosses. It can only be summoned in The Corruption.
The Eater of Worlds is like a big worm, and like Devourers, burrow under the ground. Its body is split up into many different sections. When an internal segment is destroyed, it will split into smaller worms.
The Eater of Worlds will burrow through tiles to reach the player and then attack them. Each section of it can attack separately, which means if accurate, each section can harm the player separately. To beat the boss, the player needs to kill each section.
- The Eater of Worlds also has a Hardmode version: The Destroyer
- The EoW is the only source of Shadow Scales.