Colorful Ball Trick

You conjure three magical balls into existence that move through the air in your space as you command them to. The balls remain for a minute as you concentrate on moving them around with magic as if you were juggling them. As a bonus action after you cast the spell, you can hurl the balls at one or more targets you can see within range. Make a ranged attack with each ball and deal 1d4 magical bludgeoning on a hit. If you lose concentration before you can hurl the balls, the balls fall to the ground and disappear in a puff of colored smoke.

The number of balls you summon increases by three when you reach 5th level (6 balls), 11th level (9 balls), 17th level (12 balls)