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.
Use piercing weapons to fight the Eater -- you want to hit as many segments as possible. Guns don't really have a good piercing option at this stage of the game, so use a bow with Unholy or Jester arrows. Spiky Balls also work well.
EoW is pretty easy if you get enough jester arrows with a decent bow (line up the worm with the arrow for massive damage). Having ore tier 3-4 (silver, gold, plat, wolfram) armor is probably enough.
In terms of weapons, piercing ones are the best against EoW, so i recommend using a ball o' hurt, a vilethorn or a bow with Jester arrows or unholy arrows. Using a bow with those arrows is by far the strongest of those options.
In terms of weapons, piercing ones are the best against EoW, so i recommend using a ball o' hurt, a vilethorn or a bow with Jester arrows or unholy arrows. Using a bow with those arrows is by far the strongest of those options.
As of Terraria's final update, the strongest weapon is by far the Zenith. This sword fires a whirlwind of flying blades that do thousands of damage per second. It easily tops the damage of the Star Wrath, which was the previously best sword.
Would recommend having a whole set of gold armor to get the set bonus. Have the eye of cthulu defeated so you can acquire the war axe of the night. Does 21 damage. A harpoon and a grappling hook are also useful.
The player must be in The Corruption to summon the Eater of Worlds; moving too far away from the biome during the battle will cause it to flee.
In Revengeance Mode. Eater of Worlds will become enraged if fought outside of the Underground Corruption, gaining the ability to fly towards the player if the boss cannot reach them. Individual segments do not drop Demonite Ores or Shadow Scales when killed.
Use piercing weapons to fight the Eater -- you want to hit as many segments as possible. Guns don't really have a good piercing option at this stage of the game, so use a bow with Unholy or Jester arrows. Spiky Balls also work well.