Bombs are a resource crafted in the Laboratory and used by the Alchemist to be thrown.

Bombs are the main source of ammunition for Alchemist units. When thrown, they have an area of effect which affects all units within the blast radius, and the units will sustain equal amount of damage, regardless of the distance away from the origin of the blast.

Stockpile filled with bombs.

To create bombs, you need 15 Brimstone. This requires Laboratory to be constructed.