Eater of Worlds

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Eater of Worlds
Eater of Worlds.pngOld-gen console version and Nintendo 3DS version
Map Icon Eater of Worlds.png
Map Icon
Classic Mode.png Classic
Expert Mode.png Expert
Master Mode.png Master
AI TypeWorm AI
Max Life10050 (Desktop, Console and Mobile versions)
7500 (Old-gen console and 3DS versions)
KB Resist100%
Immune toConfused
Inflicts debuff
Inflicts debuff
Debuff tooltipPhysical abilities are decreased
Chance0%1/20 (5%)1/20 (5%)
Durationn/a10 minutes12 minutes 30 seconds
Coins8 SC20 SC
Map Icon Eater of Worlds.png“A massive worm who dwells in the corruption.”Map Icon Eater of Worlds.png

The Eater of Worlds is a pre-Hardmode Corruption-themed worm boss. It is summoned using Worm Food from within The Corruption or Underground Corruption, or by destroying 3 Shadow Orbs that spawn in Corruption worlds. It can be summoned at any time of day.

The Eater of Worlds is not a single target, but a string of segments with individual health. On the Desktop version Desktop, Console version Console, and Mobile version Mobile versions, it has a total of 67 / 72 segments,[1] whereas on the Old-gen console version Old-gen console and 3DSNintendo 3DS version versions, it has a total of 50 segments. When any inner body segment is destroyed, it splits into multiple smaller worms, each with their own head and tail. Each section of the Eater must be killed in order to defeat the entire boss. The Eater of Worlds, like all worms, is immune to lava.

Fighting the Eater of Worlds is the only way to obtain Shadow Scales, and it is one of the only ways to obtain usable quantities of Demonite Ore. Individual segments drop some of these when killed, with a larger amount of them being dropped upon defeating the entire boss.[2] Defeating the Eater of Worlds for the first time also allows the Tavernkeep(Desktop, Console and Mobile versions) NPC to spawn as the Unconscious Man, (Desktop, Console and Mobile versions) and allows meteorites to land.

The Eater of Worlds is the Corruption counterpart to the Crimson's Brain of Cthulhu. The Hardmode mechanical boss equivalent to the Eater of Worlds is The Destroyer.

While the Eater of Worlds is alive, the music Boss 1 will play. When Otherworldly music (Desktop, Console and Mobile versions) is enabled, the track Boss 1 (Otherworldly) will play instead.


Classic Mode.png Classic
Expert Mode.png Expert
Master Mode.png Master
2 values: Pre-Hardmode › Hardmode
3 values: Pre-Hardmode › Hardmode › Post-Plantera
NPC ID Type Health Damage Defense Extra Drops
13 Eater of Worlds Head.png Eater of Worlds Head 150/210/267 22/48/72 2/4
14 Eater of Worlds Body.png Eater of Worlds Body 150/210/267 13/20/31 4/6
15 Eater of Worlds Tail.png Eater of Worlds Tail 150/210/267 11/17/26 8/10


  • If the player dies or leaves the Corruption, the Eater of Worlds will stop following the player and quickly go off-screen until it despawns.
    • The Eater of Worlds will not despawn while the player is in the Crimson biome.
  • Trying to summon the Eater of Worlds with Worm Food while another is still alive will not work and the item will not be consumed.
    • (Old-gen console and 3DS versions) Breaking multiple Shadow Orbs will still allow multiple Eaters of Worlds to spawn. Regardless of how many are summoned, the defeat message will only be displayed when the last head is killed.
  • Note that actually defeating the Eater of Worlds is not completely necessary to progress, as a certain amount of segments may drop the needed amount of materials.
    • (Desktop, Console and Mobile versions) However, defeating the Eater of Worlds is the only way to gain access to the Tavernkeep and Meteorites.
  • The different segments of the Eater of Worlds are not equivalent in stats: the head segment will deal significantly more damage than the body or tail, but also has the least defense.
    • The reverse is true for its tail; it has more defense than the body or head, but also deals the least damage.
  • Individual segments cannot survive on their own. Killing one segment of a part consisting of two segments will kill both segments and drop their loot.
  • When the Eater of Worlds splits, newly formed worms will tend to retreat underground before attempting to attack the player.
  • The Eater of Worlds spawns in a coiled state and gradually unravels before attacking the player. Attacking it with piercing weapons in this state will damage all of its segments, which can kill it in seconds.
  • The Eater of Worlds only takes 65% of the usual damage from the fire projectiles of the Molotov Cocktail, and the projectiles will pierce 1 less target.[3]

Expert Mode(Desktop, Console and Mobile versions) changes

  • In Expert Mode, the Eater of Worlds moves 20% faster and accelerates over twice as fast.[4]
  • The Eater of Worlds will randomly shoot Vile Spit from its head and body segments. The Vile Spit projectiles have a 1/20 (5%) chance to inflict the Weak debuff onto the player for 10 minutes but can be destroyed in a single hit from any attack or projectile.
    • Head segments will shoot more frequently at low health.[6]
    • Body segments can only shoot when they are above surface and are not in front of a background wall.[6]
  • The Eater of Worlds takes 80% less damage from the following projectiles and explosives:[3]
ID Projectile Source
30 Grenade.png Grenade Grenade
397 Sticky Grenade.png Sticky Grenade Sticky Grenade
517 Bouncy Grenade.png Bouncy Grenade Bouncy Grenade
28 Bomb (projectile).png Bomb Bomb
37 Sticky Bomb (projectile).png Sticky Bomb Sticky Bomb
516 Bouncy Bomb.png Bouncy Bomb Bouncy Bomb
29 Dynamite (projectile).png Dynamite Dynamite
470 Sticky Dynamite (projectile).png Sticky Dynamite Sticky Dynamite
637 Bouncy Dynamite.png Bouncy Dynamite Bouncy Dynamite
108 Explosives.png Explosives Explosives
281 Explosive Bunny.png Explosive Bunny Explosive Bunny
588 Confetti Grenade.png Confetti Grenade Happy Grenade
519 Bomb Fish (projectile).gif Bomb Fish Bomb Fish
773 Scarab Bomb.png Scarab Bomb Scarab Bomb
183 Beenade.png Beenade Beenade
181 Bee (projectile).gif Bee Beenade
566 Large Bee.gif Giant Bee Beenade
1002 TNT Barrel.png TNT Barrel TNT Barrel


Achievement Worm Fodder.png
Worm Fodder • “Defeat the Eater of Worlds, a massive worm who dwells in the corruption.”
Defeat the Eater of Worlds for the first time. (Desktop, Console and Mobile versions)
Category: Slayer Slayer
Achievement Slayer of Worlds.png
Slayer of Worlds • “Defeat every boss in Terraria.”
Defeat every boss in the game. (Desktop, Console and Mobile versions)
Category: Challenger Challenger


For more elaborate strategies on defeating Eater of Worlds, including weapon and arena recommendations, see Guide:Eater of Worlds strategies.
  • Effective weapons include piercing or area-of-effect weapons, such as the Vilethorn, the Water Bolt ((Old-gen console and 3DS versions)), Spiky Balls, whips(Desktop, Console and Mobile versions), and fast melee weapons, such as the Falcon Blade and the Terragrim(Desktop, Console and Mobile versions).
    • In Classic Mode, Grenades are an effective weapon against the Eater. That is not true in higher difficulties, since the Eater gains resistance to explosives.
  • Like other worm-types, once the Eater's head passes a given point, every body segment must follow. This allows the player to stand next to the body, attacking every segment as it goes by. The player should be wary of the head looping back around.
  • Killing the head of the Eater of Worlds causes its speed to drastically decrease, almost to a stop.
  • If possible, try to aim for the head or tail of each section, as if they die first, the Eater of Worlds will not split. Note that the head is far more vulnerable.
  • If fighting in a chasm, be wary of getting surrounded, which can lead to death very quickly, especially in Expert or Master Mode. A quick way to escape is to have a Bed to teleport to (using Recall Potions or a Magic or Ice Mirror) above the battle area.
    • It may be preferable to hollow out an area in the Corruption in advance, in order to avoid this situation.
  • Farming the Eater of Worlds is particularly profitable, being one of the most effective ways of making money prior to Hardmode.
  • Since each segment can drop loot when killed, it can be a good source of Presents during Christmas, and Goodie Bags, Bloody Machetes, and Bladed Gloves during Halloween.
  • In Hardmode, it can provide other items as well:
    • It is a good way to farm for a (Desktop, Console and Mobile versions) Corruption Key / (Old-gen console and 3DS versions) Mold, as every segment has a chance of dropping one.
    • In a Corrupt Snow biome, it can drop Amaroks(Desktop, Console and Mobile versions), with each selling for a base value of 4 GC.
    • In a Corrupt Ocean, it can drop Pirate Maps.
  • The Eater of Worlds will start to flee underground if the player leaves the Corruption biome, but will not immediately despawn. Players can utilize this mechanic to keep the Eater of Worlds away from themselves without despawning it by moving in and out of the Corruption, watching for the boss's icon on the minimap to make sure it does not leave.
  • (Desktop, Console and Mobile versions) Using a flail will block any Vile Spit from hitting the player when Use / Attack is held down. Alternatively, a whip would also work for it can sweep a large area clean of Vile Spit in a single whip.


The Eater of Worlds artwork on the Steam Workshop page.
  • The Eater of Worlds and Skeletron are the only bosses that do not have their own unique AI.
  • The Eater of Worlds might spawn outside of map boundaries on rare occasions when breaking Shadow Orbs.
  • The Eater of Worlds is sometimes abbreviated as "EoW".
  • With five eyes on the body segments and three eyes on the head and tail segments each, the Eater of Worlds has (Old-gen console and 3DS versions) 246 / (Desktop, Console and Mobile versions) 331 / 356 eyes in total.
  • (Desktop, Console and Mobile versions) The Eater of Worlds measures roughly 195 / 209 tiles.
  • Assuming that the player is at 5′ 9″ (1.75 m) in terms of height, the Eater of Worlds would be about 124.4 yards (113.75 m) long or 133.33 yards (121.92 m) long in Expert Mode.
  • The Eater of Worlds has the highest health of all pre-Hardmode bosses.
  • Oddly enough, but most likely intentionally, it is not required to actually completely defeat the Eater of Worlds to get progression-locked items such as the Nightmare Pickaxe or Shadow Armor, since each separate segment drops Shadow Scale.
    • Because the Eater of Worlds has no more unique drops than the Mask, Trophy, and the Eater's Bone in Classic Mode, this can prove beneficial for players who are not strong enough to fight it yet but want better gear.
      • However, in Expert Mode and above, defeating it does reward the player with the Worm Scarf.
    • The ability to drop progression-locked materials is a trait shared with Brain of Cthulhu, the Crimson counterpart to this boss.
  • Terraria lore pages – According to the Terraria lore pages, the Destroyer is a simulacrum of Cthulhu's spine. Despite the Destroyer taking heavy influence from it, the Eater of Worlds has no connection to Cthulhu and is not mentioned to be a former body part, unlike other pre-mech forms.
  • According to Redigit, the Eater of Worlds is named Edward.[7] This statement was most likely a joke[8] and is not considered official lore.[9]
  • The Steam Workshop page appears to show the Eater of Words with centipede-like legs rather than its usual worm-like depiction.
  • Contrary to its name, the Eater of Worlds does not "consume" or destroy any blocks.
  • According to the Angler, a severed piece of the Eater of Worlds fell into the water and mutated a corrupt fish, creating the Eater of PlanktonEater of Plankton.
  • The BestiaryBestiary entry for the Eater of Worlds: "Conceived from the bottomless malice of the Corruption, this mighty abyssal worm tunnels wildly to devour all in its path."


  • Desktop 1.4.4:
    • Restructured how Demonite Ore/Shadow Scale drops are handled in Expert and Master. Overall, the quantity of drops from segment kills has been reduced, while the amount of drops from Treasure Bags has been increased.
    • In Expert Mode, the total quantity of drops is split roughly evenly, with 50% of the ore/scales coming from the partial kills and 50% coming from Treasure Bags.
    • In Master Mode, the total quantity of drops is weighted heavily toward the Treasure Bag, with only 25% of the rewards coming from partial kills, and 75% coming from the Treasure Bags.
    • Classic Mode drop rates and weighting has been left entirely untouched by all of these changes.
  • Desktop Defeating the Eater of Worlds now allows Meteorites to fall rather than breaking a Shadow Orb, and defeating more Eater of Worlds will increase the chance of a Meteorite falling the following night.
  • Desktop 1.1.2: The Eater of Worlds can now spawn when a third Shadow Orb is broken within the Hallow, but will still flee due to not being in the Corruption.
  • Desktop 1.0.6:
    • No longer defeated when it flees.
    • Head health reduced from 80 to 65, damage reduced from 43 to 22.
    • Body health reduced from 210 to 150, damage reduced from 18 to 13, defense reduced from 7 to 4.
    • Tail health reduced from 300 to 220, damage reduced from 15 to 11, defense reduced from 10 to 8.
  • Desktop 1.0.5:
    • No longer drops Shadow armor.
    • Can no longer follow players out of the Corruption.
    • Head health reduced from 140 to 80, damage reduced from 50 to 43.
    • Body health reduced from 230 to 210, damage reduced from 25 to 18.
    • Tail health reduced from 350 to 300.
  • Desktop 1.0.4:
    • Fixed a bug where simply selecting Worm Food in the quick bar summoned the Eater of Worlds.
    • Head health increased from 120 to 140, damage increased from 40 to 50, defense increased from 0 to 2.
    • Body health increased from 200 to 230, damage increased from 10 to 25, defense increased from 4 to 7.
    • Tail health increased from 300 to 350, damage increased from 10 to 15, defense increased from 8 to 10.


  1. Information taken from the Desktop version Desktop source code, methods GetEaterOfWorldsSegmentsCount() in Terraria.NPC.cs and AI_006_Worms() in Terraria.NPC.cs. Note that the worm-type segment counts in the code are only for the body segments, and do not include the head or tail; hence 65/70 becomes 67/72
  2. Information taken from the Desktop version Desktop source code, methods DropEOWLoot() in Terraria.NPC.cs, AI_006_Worms() in Terraria.NPC.cs, and RegisterBoss_EOW() in Terraria.GameContent.ItemDropRules.ItemDropDatabase.cs. There may be inaccuracies, as the current Desktop version Desktop version is
  3. 3.0 3.1 Information taken from the Desktop version Desktop source code, method Damage() in Terraria.Projectile.cs.
  4. Information taken from the Desktop version Desktop source code, method AI_006_Worms() in Terraria.NPC.cs.
  5. A tick is a time unit countable by the software. Most of Terraria's updating logic happens every tick. A tick has the length of 1/60th of a second, hence there are 60 ticks in a second and 3600 ticks in a minute.
  6. 6.0 6.1 Information taken from the Desktop version Desktop source code, method AI_006_Worms() in Terraria.NPC.cs. Head segments initially have a [math]\displaystyle{ \frac{1}{90+\frac{\text{Current health}}{\text{Max health}}\times300} }[/math] chance every tick[5] to shoot (1/390 (0.26%) chance at full health, with the chance getting higher as the segment's health decreases). Body segments simply have a 1/900 (0.11%) chance every tick.
  7. Comment on an r/Terraria post April 26, 2022
  8. Redigit (July 24, 2022): Never take anything I say about lore seriously XD (archived from the original on 11 Jan 2024, 08:32:06 UTC)
  9. Redigit (July 24, 2022): The only concrete lore is what you see in the game. The rest is up for the player to interpret how they wish. (archived from the original on 11 Jan 2024, 08:34:53 UTC)