This spell brings into being a brief maelstrom of dagger-like flying darts of enchanted force, that whirl and flash about within the spell’s area of effect, slicing all creatures they come into contact with. Each creature in a 10-foot tall by 25-foot wide cylinder centered on a point of the caster’s choosing must make a Dexterity saving throw. A target takes 6d4 force damage on a failed save, or half as much damage on a successful one. 

The magical blade-like “darts” the spell creates are emissions of a whirling magical field. Shields and armor can’t stop them, though a wall or closed door can; rather than ricocheting off a partial barrier such as a shield, a dart simply “dissolves” back into the field and flares into sharpness again on the other side of the barrier.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d4 for each slot level above 4th.