Energy Stream

You create a burst of magical energy to knock back foes that dare to enter your range. Each creature in a 15-foot cone must make a Strength saving throw. On a failed save a creature takes 5d8 force damage and is knocked back prone 15 feet away from you, on a successful save it takes only half damage and its not knocked back prone.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.