Blinding charge

You raise your hand and, having warned your allies, snaps your fingers. A blinding flash of lightning bursts out of your hand. All enemy creatures in a 20-foot sphere centered on you must make a Constitution saving throw. On a failed save, a creature takes 3d6 lightning damage and is blinded till beginning your next turn. On a successful save, the creature takes half as much damage and isn't blinded.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.

[Tome of spells: Lightning]