The Mechanical Brain is made from 6 Vertebrae, 6 souls of night and 6 iron or lead bars. when used at night it will cause the motherboard to spawn which is a hardmode version of the BoC. The brain also has a very small chance of dropping from any mob, like any other mech boss spawning item.
Known Bugs Edit
- When The Mechanical Brain is used The Motherboard will fly up and despawn (This was fixed in latest mod bugfixes update)