A spark of bright light arcs from you to a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d8 lightning damage. On a critical hit, the target is also blinded until the end of its next turn.   The spell creates more than one spark when you reach higher levels: two sparks at 5th level, three sparks at 11th level, and four sparks at 17th level. You can direct the sparks at the same target or at different ones. Make a separate attack roll for each spark.