Eldritch Lightning Strike

You call down a bolt of lightning on a creature within range. The target must make a dexterity saving throw. The target takes 3d6 lightning damage on a failed save and is stunned for one round, On a success the target only takes half damage and is not stunned.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you can target one additional creature and the damage increases by 1d6 for each slot level above 3rd.