Ball Lightning (EFA - B)

You create one to four 3-foot diameter spheres of lightning. The more spheres you create, the less powerful each sphere is individually. Each
sphere appears in an unoccupied space you can see within range. Each sphere sheds dim light in a 30-foot radius

As a bonus action, you can move each sphere up to 30 feet, but no farther than 120 feet away from you. When a creature other than you comes within 5 feet of a sphere, the sphere discharges lightning at that creature and disappears. That creature must make a Dexterity saving throw. On a failed save, the creature takes lightning damage based on the number of spheres you created.

(4 spheres = 2d4, 3 spheres = 2d6, 2 spheres = 5d4, 1sphere = 4d12).