Conjure Lightning

A churning storm cloud forms, centered on a point you can see and spreading to a radius of 60 feet. Lightning flashes in the area, thunder booms, and strong winds roar. Each creature under the cloud (no more than 5,000 feet beneath the cloud) when it appears must make a Constitution saving throw. A creature takes 2d8 thunder damage and is deafened for 1 minute on a failed save, or half as much damage isn't deafened on a successful one. A creature deafened by this spell makes another Constitution saving throw at the end of each of its turns. On a successful save, the creature is no longer deafened.

When you cast the spell, a bolt of lightning flashes down from the cloud to strike a point of your choice that you can see beneath the cloud. Each creature within 5 feet of the point you choose must make a Dexterity saving throw. A creature takes 10d6 lightning damage and is paralyzed for 1 round on a failed save, or half as much damage and isn't paralyzed on a successful one. The lightning ignites flammable objects in the area that aren't being worn or carried. On each of your turns until the spell ends, you can use your action to call down lightning in this way again, targeting the same point or a different one.

If you are outdoors in stormy conditions when you cast this spell, the spell gives you control over the existing storm instead of creating a new one. Under such conditions, the spell's damage increases by 2d6.

At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, the damage increases by 1d6 for each slot level above 7th.