You summon a magical aura of weapons to protect you. They surround you to a distance of 10 feet for the duration. When you cast this spell, you can designate any number of creatures you can see to be unaffected by it. At the start of each of your turns, any affected creature in the aura takes 4d6 force damage. 

When you cast the spell, you can make a melee spell attack against a creature within the aura. On a hit, the target takes force damage equal to 3d12 + your spellcasting ability modifier. As a bonus action on your turn, you can repeat the attack against a creature within the aura.