Weapon Magic: Branching Steel

After channeling magic into your weapon, the weapon branches out into a maze of sharp steel. Each creature in a 60-foot cone must make a dexterity saving throw. A creature takes 8d10 magical piercing 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 6th level or higher, the damage increases by 1d10 for each slot level above 5th.