Thunderous Smite

Casting time: 1 Bonus action —Range: Self
Components: V
Duration: up to 1 min. + Concentration
One time on hit with a melee weapon, the attack is audible in a 300 ft radius and deals
an extra 2 d6 Thunder dmg.
Also the target must make a Strength saving throw, on a fail it is pushed 10 ft. away and knocked prone.