Dismantle

 Dismantle: The default slash, which instantly slices a target into many small cubes at a point of your choice within range. Each creature in a 10-foot-radius sphere centered on that point must make a Constitution saving throw. A creature takes 3d8 slashing damage on a failed save, or half as much damage on a successful one. 

A nonmagical object that isn't being worn or carried also takes the damage if it's in the spell's area.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d8 for each slot level above 2nd.