Mechanical Wormhead

The Mechanical Wormhead is a War Mode item used to summon The Combined. It looks like a mechanical skull with mechanical eyes in the eye sockets, and the tail of the destroyer coming out the bottom. The eyes have red pupils.

Stats
Used to summon The Combined

"This is a work of combination..."

1 gold

Crafting
1 mechanical skull

2 mechanical eyes

1 mechanical worm

15 souls of night

15 souls of light

Trivia
This seems to be a combo of the three mechanical boss summoning items.