Cone of Sand

You touch one willing creature and imbue it with the power to launch magical sand from its hands, provided it has hands.  Until the spell ends, the creature can use an action to blast sand in a 15-foot cone. Each creature in that area must make a Dexterity saving throw, taking 3d6 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 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.