The mine bulb is essential in the construction of mines. It exists only in Soulforge Cathedral and can be manufactured from an Iron Chassis and Quicklime Mixture by amalgamation. In appearance, the mine bulb is a tawny gray object of the same shape as a regular mine. The mine is completed by running the bulb through the Sealing Machine (along with a Steel Plate).
It can also be merged with a Bantam Node with the Sealing Machine to create an Explosive (Sunburst) Device.