Blast of Force

You thrust out your hand and from its palm erupts a cone of white light. Any creature caught in the cone of light must take 2d6 force damage and make a dexterity saving throw. If the creature fails its saving throw it takes full damage and is knocked back 15ft. IF the creature succeeds its saving throw it stays in the same place and takes half damage. 

When cast at higher levels Blast of Force deals one more d6 of damage for each level above first. Additionally when cast at third third level and higher any creature who fails its saving throw is knocked prone.