Thunder Bolts

You touch a weapon with the ammunition property, such as a crossbow, bow, sling, or blowgun. Until the spell ends, the weapon ignores the loading property (if it has it), and if you fire the affected weapon without manually loading ammunition in it beforehand, this spell condenses nearby air into ammunition for the weapon. These "thunder bolts" (so called, regardless of what form the ammunition takes) do 1d4 thunder damage instead of the amount and type of damage normally done by the weapon, and can use your spellcasting ability modifier for the attack and damage rolls, instead of Dexterity.
The thunder bolts' damage improves to 1d6 at level 5, to 1d8 at level 11, and to 1d10 damage at level 17.