A 60-foot radius storm cloud that is 10 feet high appears in a space 100 feet above you. If there is not a point in the air above you that the storm cloud could appear, the spell fails (such as if you are in a small cavern or indoors).
On the round you cast it, and as an action on subsequent turns until the spell ends, you can call down a bolt of lightning to a point directly beneath the cloud. Each creature within 5 feet of the point makes a Dexterity saving throw , taking 3d10 lightning damage on a failed save or half as much on a successful one.
If you are outdoors in a storm when you cast this spell, you take control of the storm instead of creating a new cloud and the spell’s damage is increased by 1d10.
The damage increases by 1d10 for each slot level above 3rd.
Sidoneth’s Chill Call Lightning. This spell’s silent and purple lightning strikes deal cold damage and don’t damage objects or leave marks on bodies. The spell has no vocalized component.