Mechanical Worm

Type	Boss summonCrafting material
Tooltip	Summons The Destroyer
Rarity
Research	3 required
Use	https://terraria.wiki.gg/wiki/File:Roar_0.wav

The Mechanical Worm is a Hardmode boss-summoning item used to summon The Destroyer, the Hardmode version of the Eater of Worlds. It can only be used at night; attempting to use this item during the day will not spawn the Destroyer nor consume the item. The Mechanical Worm is also unusable while the Destroyer is already alive. If the Destroyer has not been defeated yet in a Hardmode world, all enemies have a 1/2500 (0.04%) chance of dropping a Mechanical Worm, with the exception of statue-spawned enemies, Meteor Heads, and Old One's Army enemies.

Crafting

Recipes

Result	Ingredients	Crafting station
Mechanical Worm	Rotten Chunk6 Any Iron Bar5 Soul of Night6	Mythril Anvil or Orichalcum Anvil
Mechanical Worm	Vertebra6 Any Iron Bar5 Soul of Night6	Mythril Anvil or Orichalcum Anvil

Used in

Result	Ingredients	Crafting station
Ocram's Razor(Desktop, Console and Mobile versions)	Mechanical Eye Mechanical Skull Mechanical Worm	Mythril Anvil or Orichalcum Anvil

Notes

(Desktop, Console and Mobile versions) In the get fixed boi secret world seed, the Mechanical Worm is not consumable and is instead a crafting material for the Ocram's Razor, an item used to summon Mechdusa.
Unlike Worm Food, a Mechanical Worm can be used outside of The Corruption. However, it requires nighttime for usage, whereas Worm Food lacks a time requirement.
Like other mechanical boss summoning items, the Mechanical Worm can be brought to pre-Hardmode worlds and will successfully summon The Destroyer there.
As with several items, the Mechanical Worm has multiple crafting recipes (four in total) due to some items in the recipe allowing substitutes.

Achievement

Like a Boss • “Obtain a boss-summoning item.”

Obtain any boss-summoning item. (Desktop, Console and Mobile versions)

Trivia

Like the Mechanical Skull, it looks like a wind-up toy.
There used to be a minor grammatical error in the item's tooltip: It previously said "Summons Destroyer" instead of "Summons The Destroyer". In the Nintendo 3DS version, this mistake was never present.