Thunderwalker

You can use an action to teleport yourself to a free space that you can see within 30ft. You arrive with a blast of thunder that is audible out to 200ft. All creatures within 10ft. of your point of arrival have to make a Constitution saving throw. On a failed saving throw they take 2d8 Thunder damage, are knocked Prone and are Deafened until the end of their next turn. On a successful save they only take half damage and are not knocked Prone or Deafened.