While holding a blade, you cast this spell and it shatters into 1000 pieces which are suspended in air for a split second before they start rapidly rotating around in a 5 foot radius circle centered on you.
Each creature, besides the caster, in range must make a dexterity saving throw and take 3d4 slashing damage when the spell is cast or half that on a successful save.
Any creature that passes through the ring of blades takes 1d4 slashing damage.
At the end of the spell, the blades immediately reforms into the original. Any poison or physical properties such as silvered that apply to the blade also applies to them when they are suspended. However, enchantments or magical effects on the blade do not.
For each spell slot used above third to cast this spell, the initial damage increases by 2d4.* - (1 blade, consumed for the duration of the spell)