During your turn, you may take a bonus action to target a 5ft sphere centered on a point in range. You may have no more than 3 areas targeted at the same time, although areas may overlap. On your turn you may use your action to detonate the targeted areas. All creatures within a targeted area are struck by lightning, dealing lightning damage equals to 2d6 + your spellcasting modifier. (Creatures that are within multiple targeted areas take this damage multiple times) Detonating the areas  causes to spell to end.

The areas crackle with dim magical energy, but are otherwise invisible. They can be located with a successful Intelligence (Investigation) or Intelligence (Arcana) check against your spell save DC.

At Higher Levels. When you cast this spell with a spell slot of 2nd level or higher, the amount of areas you can target increases by 1 for every spell level above 2nd.