Bound Armaments

You bind magical shards of power to form razor sharp blades that grow in power when you successfully hit creatures with an attack. Until the spell ends, each time you hit a creature with a melee weapon attack, a blade is summoned above your head. Up to 4 blades can be summoned at a time. As a bonus action on subsequent turns, you can strike with the blades, directing them to one target you can see within 30 feet or multiple. Each blade individually does 1d4 piercing damage. The blades all strike simultaneously.

At higher levels. When you cast this spell using a spell slot of 4th level or higher, the damage of each blade is increased by 1d4 for every two slot levels above 2nd.