Concussive Cone

You clap your hands together to generate a wave of concussive force. All creatures in a 15-foot Cone must make a Constitution saving throw. On a failed save, a creature takes 2d6 Thunder damage and has the Stunned condition until the end of your next turn. On a successful save, a creature takes half as much damage and is Dazed until the end of your next turn.

A Dazed creature can only do one of the following things on their turn: move, use an action, or use a bonus action. If a creature becomes Dazed during their turn, their turn ends.

Using a Higher-Level Spell Slot. The extra damage increases by 1d6 for each spell slot level above 2.