THUNDEROUS SMITE (PHB 2024, PAG. 334)

Casting Time: Bonus Action, which you take immediately after hitting a target with a Melee weapon oran Unarmed Strike.

Your strike rings with thunder that is audible within 300 feet of you, and the target takes an extra 2d6 Thunder damage from the attack. Additionally, if the target is a creature, it must succeed on a Strength saving throw or be pushed 10 feet away from you and have the Prone condition.
Using a Higher-Level Spell Slot. The damage increases by ld6 for each spell slot level above 1.