Dark Bullet

You fire out a rapid dark black bullet from your fingertips, at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d6 Dark damage. Targets hit by the attack must take a wisdom saving throw, on a failed save the target suffers a -1 AC penalty for the remainder of the combat round.

This spell's damage increases by 1d6 when you reach 5th level (2d6), 11th level (3d6), and 17th level (4d6). Each shot fired gained on subsequent levels, can be split between targets.