Energy Whip

You create a long, whip made of sparking force to lash out toward a creature in range. Make a spell attack against the target. If the attack hits, the creature takes 1d6 piercing damage, and if the creature fails a dexterity save, is knocked prone

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