Crystal Wave

After you touch the ground, a thin sheet of crystal rapidly extends forth in a 15-foot cone, then ruptures, causing crystal shards to launch skyward. Each creature in the cone must make a Dexterity saving throw. A creature takes 3d6 slashing damage on a failed save, or half as much on a successful one.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.