Blare of the Archon

You create a short-lived glowing magical horn which you blow to unleash a deafening blast. All creatures in a 60 ft. cone in a direction you choose emanating from the horn must make a Constitution saving throw. Each creature that fails their save takes 8d6 thunder damage, is pushed 10 ft. away from you, knocked prone, and becomes deafened for 1d4 rounds. Creatures that succeed at their saving throw take half damage and are not pushed or knocked prone.