Source: Dungeon Masters Guide
Explosives
A campaign might include explosives from the Renaissance or the modern world (the latter are priceless), as presented in the Explosives table.
Explosives
| Renaissance Item | Cost | Weight |
|---|---|---|
| Bomb | 150gp | 1lb. |
| Gunpowder, keg | 250gp | 20lb. |
| Gunpowder, powder horn | 35gp | 2lb. |
| Modern Item | Cost | Weight |
|---|---|---|
| Dynamite (stick) | - | 1lb. |
| Grenade, fragmentation | - | 1lb. |
| Grenade, smoke | - | 2lb. |
| Grenade Launcher | - | 7lb. |
Bomb
As an action, a character can light this bomb and throw it at a point up to 60 feet away. Each creature within 5 feet of that point must succeed on a DC 12 Dexterity saving throw or take 3d6 fire damage.
Gunpowder
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.
Dynamite
As an action, a creature can light a stick of dynamite and throw it at a point up to 60 feet away. Each creature within 5 feet of that point must make a DC 12 Dexterity saving throw, taking 3d6 bludgeoning damage on a failed save, or half as much damage on a successful one.
A character can bind sticks of dynamite together so they explode at the same time. Each additional stick increases the damage by 1d6 (to a maximum of 10d6) and the burst radius by 5 feet (to a maximum of 20 feet).
Dynamite can be rigged with a longer fuse to explode after a set amount of time, usually 1 to 6 rounds. Roll initiative for the dynamite. After the set number of rounds goes by, the dynamite explodes on that initiative.
Grenades
As an action, a character can throw a grenade at a point up to 60 feet away. With a grenade launcher, the character can propel the grenade up to 120 feet away.
Each creature within 20 feet of an exploding fragmentation grenade must make a DC 15 Dexterity saving throw, taking 5d6 piercing damage on a failed save, or half as much damage on a successful one.
One round after a smoke grenade lands, it emits a cloud of smoke that creates a heavily obscured area in a 20-foot radius. A moderate wind (at least 10 miles per hour) disperses the smoke in 4 rounds; a strong wind (20 or more miles per hour) disperses it in 1 round.
