Artisanal Bomb

You throw a bomb up to 30 ft away which then explodes in a 15 ft diameter sphere. Any creature caught in the blast must make a Dexterity saving throw or take 2d6 fire damage on a failed save, and half as much on a successful one. The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level.