Warx Wonderball

You create a ball of light and throw it at a creature you can see within range. Make a ranged spell attack on the creature. On a hit, the creature is bathed in bright light from the ball. All attack rolls against the creature have Advantage until the spell ends. 

When cast using a higher level spell slot, an additional ball is created per level (2 balls at 2nd level, 3 balls at 3rd level, etc.). Each ball can be thrown at the same creature or at different creatures.