Arcane Pistol

You channel arcane power through the firearm, unleashing a powerful blast of energy toward a creature in range. Make a ranged attack roll, on a hit the target takes 1d8 force damage. If you roll a 20 on the attack roll, in addition to the normal bonuses add an additional damage dice.

The spell fires additional blasts at higher levels, 2 blasts at 5th level, 3 blasts at 11 level and 4 blasts at 17 level. You can direct the blasts at one creature or multiple, make a separate attack roll for each blast. If you roll a 1 on an attack roll, make no further attacks as the spell misfires and the blasts fly off wildly.