Dragon wings

You call upon your dragon ancestory to bring forth wings. A pair of wings grows from you back granting you a fly speed of 60ft.  You can use a reaction action to cause your wings to force a powerful burst of air in  30 foot cone to move creature back 15 feet and on a failed strength saving throw  the creature is knocked prone. A large creature gets advantage on the saving through and small creatures gets disadvantage on the saving throw. 

This action can also be used remove any gaseous or non magical fire affecting the same area.