Brontekos' Roar of Thunder

You pour all of your emotions into a cry so overwhelmingly loud it can be heard up to 500 feet away. Each creature in a 75 foot cone centered on you must make a Constitution saving throw. On a failed save, a creature takes 8d8 thunder damage and is frightened for one minute. On a successful save, the creature takes half as much damage and isn’t frightened. 

A frightened creature can make a Wisdom saving throw at the end of each of its turns. On a successful save, the frightening effect ends.

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the range increases by 10 feet for each slot level above 7th.