Booming Bolt

Make a ranged attack with a weapon against a creature. On hit, the target suffers the attack's normal effects and if it willingly moves before the end of your next turn, it takes 1d4 thunder damage and the spell ends.

At 5th level, the ranged attack deals an extra 1d4 thunder damage, and the moving damage increases to 2d4. Both damages increase by 1d4 at 11th and 17th level.