Thunderous Smite - Action

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. On a hit, your weapon rings with thunder that is audible within 300 feet of you, and the target suffers the weapon attack’s normal effects and an extra 2d6 thunder damage. Additionally, if the target is a creature, it must succeed on a Strength saving throw or be pushed 10 feet away from you and knocked prone.