Distortion Blade

You brandish a weapon in your hand swinging it forward from across the room, the gnoll begins to laugh before it's head falls to the floor. choose a creature within 40ft, roll a spell attack against that creature, this spell deals magical force damage equal to the regular damage  provided by the weapon, you gain no proficiency bonus with the damage of this weapon unless you already hold proficiency.

This concentration spell lasts for 1 minute, you can make this attack on each of your turns as a bonus action.