Gunpowder is chiefly used to propel a bullet out of the barrel of a pistol or rifle, or it is formed into a bomb. Gunpowder is sold in small wooden kegs and in water-resistant powder horns.

Setting fire to a container full of gunpowder can cause it to explode, dealing fire damage to creatures within 10 feet of it (3d6 for a powder horn, 7d6 for a keg). A successful DC 12 Dexterity saving throw halves the damage. Setting fire to an ounce of gunpowder causes it to flare for 1 round, shedding bright light in a 30-foot radius and dim light for an additional 30 feet.