Alchemist’s Grenade

Not actually magic, 1 vial of alchemist’s fire tied to 1 vial of gunpowder. Throw up to 60 feet at a point. Upon impact each creature within a 20 foot radius must make a dex saving throw. Creatures takes 6D6 fire damage on a failed save and half as much on a successful one. Also on a failed save the target creature takes 1D6 fire damage at the start of each of its turns, can make a dex save to put out the flames.

DC=8+DEX Modifier+Proficiency Bonus