Ball Lightning

You conjure three spheres of crackling lightning that orbit you, occupying your space. As a bonus action on your turn, you can move each sphere up to 60 feet. Each sphere can pass through creatures, but cannot pass through or end its movement inside nonmetallic objects, and cannot enter the same space more than once per turn.

Whenever a sphere or a creature enters the other’s space on a turn, you can make a melee spell attack against the creature. On a hit, the creature takes 3d6 lightning damage.

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, you conjure one additional sphere for each slot level above 7th.