You shoot a bullet of compressed air at a creature or object within range. Make a ranged Spell Attack against the target. On a hit, the target takes 1d10 Thunder Damage. All medium to small flames that the bullet passes within 5 feet of are extinguished. 

The spell creates more than one bullet when you reach higher levels: Two bullets at 5th level, three bullets at 11th level, and four bullets at 17th level. You can direct the bullets at the same target or at different ones. Make separate Attack Rolls for each bullet.