Swords of Damocles

You cause a suitable blade to be imbued with holy strength. It multiplies and flits around you to a distance of 15 feet for the duration. 

When you cast this spell, you can designate any number of creatures you can see to be unaffected by it. Each time an affected creature makes an attack, it must make a Wisdom saving throw. On a failed save, the creature takes 2d8 radiant damage (if you are good or neutral) or 2d8 necrotic damage (if you are evil). On a successful save, the creature takes half as much damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 3rd.