Gunpowder

Gunpowder or blackpowder was a substance that existed across many worlds in the multiverse that was similar to the magic alchemical substance known as smokepowder.

Description
Typically gunpowder would explode when ignited, but there were a number of crystal spheres where this was not the case. And gunpowder brought into these worlds from another would become inert.

Creation
Much like smokepowder, nitre, and sulfur were components of this substance.

Availability

 * In Loudwater, the local apothecary sold gunpowder.

Beyond the Realms

 * Earth
 * Beyond the Prime Material plane, gunpowder could be found in the Demiplanes of Dread, such as Barovia.

Usage
On worlds where it was not inert, gunpowder was primarily used for firearms.

Trivia
Wizards could learn how to make gunpowder from the spell Alamir's fundamental breakdown.