Auric's Sylvan Curse

A blistering torrent of foul oaths, curses and expletives spews forth from you, thrumming with the magic of the Archfey. Each creature in a 30-foot cone must make a strength saving throw, a creature who can understand Sylvan makes its saving throw with disadvantage. A creature takes 4d12 force damage on a failed save and is knocked prone as it is buffeted by your violent words. On a successful save it takes half as much damage and is not knocked prone.