Elthunder

You send a ball of thunder at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 2d8+1 thunder damage. A person hit with this spell gain a static charge that is released on their next action. It delivers an 1d4 of additional thunder damage

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).