Thalion's Flurry of Stars

You create a flurry of tiny sparkling lights within a 5 foot cube on a point you can see. This is normally a harmless sensory effect that appears to be mere glitter, but in the midst of combat this is enough to throw off your opponent. 

The first time this is cast on a creature each day, that creature will become distracted by the lights and gain disadvantage on their next attack roll.