The 机械骷髅头 is used to summon 机械骷髅王, the hardmode version of 骷髅王. It can only be used during night time. Using another Mechanical Skull while Skeletron Prime is alive will not consume the skull, and a second Skeletron Prime will not be summoned. It can also be used in a world without hardmode activated.
If you have not defeated Skeletron Prime yet and are already in hardmode, all enemies (minus statue-spawned enemies and meteor heads) have a 1 in 2500 chance of dropping this item.
- The Mechanical Skull's texture is based off of the 骷髅头灯笼 furniture item.
- Like the 机械蠕虫, it looks like a wind-up toy.
- The Mechanical Skull bears a slight resemblance to the old Skeleton sprite, before update 1.0.4.
- 1.2.1：Drop chance reduced from 1 in 1000 (0.1%) to 1 in 2500 (0.04%).
- 1.2：Now a 困难模式 drop. Recipe changed.