Westcott's Destructive Digits

You release a quick bolt of arcane energy from the tip of any finger of your choosing. Make a ranged spell attack against the target. On a hit the target takes 1d6 force damage. If the attack roll scores a critical hit , the damage increases and the target instead takes 1d12 force damage.

This spell's damage increases when you reach 5th level (2d6/2d12), 11th level (3d6/3d12), and 17th level (4d6/4d12). This spells attack rolls also score critical hits on a 19 or 20 once you reach 5th level. It will score a critical hit as well on 18's once you reach 11th level. Lastly, it will score critical hits on 17's once you reach 17th level.

“That was the first and last time a highwayman ever put a finger gun to my head”

— Unknown