Demon Scythe

A spinning scythe appears in front of you, gaining speed before shooting out. Make a melee spell attack against a creature within 5ft of you. On a hit, a targer takes 6d6 slashing damage. Regardless of whether you hit or not, that target and every other creature in a 60 feet line behind it must make a Dexterity saving throw. A creature takes 6d6 slashing damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.