As you make a melee attack roll with a sword, you feel a magical gust of wind behind you, increasing the range of your attack to 15 feet. On a hit, your weapons normal damage is replaced with 3d8 slashing damage and the magical gust of wind pushes them backwards. The target must succeed on a strength saving throw or be thrown back by 30 feet and knocked prone. Hit or miss, the target takes 2d8 force damage.

At higher levels:  The slashing damage increases by 2d8 for each slot level above 3.