Arcane Turret Wall

The air in a cube 5 feet on each side, centered on a point you choose within range, is surrounded by a bevvy of arcane bullets. A creature entering the spell's area for the first time on a turn or starts its turn there takes 4d4 piercing damage as the bullets rip through them.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 2d4 for each slot level above 2nd.