Arcane Greatsword

You project a giant ephemeral blade from your focus, lashing out in a wide sweep before it vanishes. Each creature in a 10-foot cone must make a Dexterity saving throw. A creature takes 3d12 force damage on a failed save. The blade passes unattended objects in the area, leaving them unharmed.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d12 for each slot level above 1st.