Echoing Strike

You hurl a wave of echoing energy at a creature you can see within range.  The target must make a Constitution saving throw.  On a failure, the target takes 1d6 thunder damage and is pushed back 5 feet away from you in a straight line.

At Higher Levels.  This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6).