Thundercloud

Select a target in range to be affected by this spell. A 5ft diameter storm cloud is generated 5ft above the target while you have concentration. Creatures in the cloud at the start of their turn take 1d8 lightning damage. At any point of the target's turn, you may use a reaction to dismiss the thundercloud and deal 1d8 lightning damage to the target. If you do not have a reaction, concentration must be maintained until the target's subsequent rounds until you choose to dismiss it. All creatures in a 15 ft diameter sphere of the target must make a Dexterity saving throw. On a failed save they take 1d8 thunder damage. On a successful save they take half damage. The target does not make a saving throw and they are dealt 1d8 thunder damage directly.

You may choose to cast this spell at a higher level, for each level, you may +6 to the damage of the lightning strike and the thunder strike, and +10 to the lightning damage from being within the cloud