Aurora's Missile Aegis

You create three glowing darts of magical force in your space. They float in the air and orbit you for the spell’s duration. When a creature you can see enters a space within 10 feet of you, you can expend one or more of the darts, sending each one unerringly to strike the triggering creature. Each dart deals 1d4 + 1 force damage to its target. The darts all strike simultaneously.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the spell creates one more dart for each slot level above 1st.