Mechanical Worm

The Mechanical Worm is used to summon The Destroyer (a harder version of the Eater of Worlds). It can only be used at night; attempting to use it during the day will do nothing and will not consume the item. Unlike Worm Food, it can be used outside of the Corruption. It can be crafted on Mythril Anvil. Using another Mechanical Worm while The Destroyer is already spawned will result in nothing happening (only rarely) or instant death. It can also be used in a world without hardmode activated.

Note

 * It is worth noting that, much like the Mechanical Skull, it has a wind-up key on the back of the worm. As mentioned in the Mechanical Skull article, many toys require such key to be operational.