Banshee Wail

You let loose a mournful scream that attempts to rip the souls from the bodies of those who hear it. Each creature in a 30ft. cone must make a constitution saving throw. A creature takes 8d10 psychic damage, half as much on a success. Creatures who fail the save by 10 or more instantly drop to 0 hitpoints

At higher levels: When cast using a slot of 7th level or higher the damage increases by 1d10 for each level above the 6th.